SELLOS BURGMANN

Mechanical SealsConventional and Gas-lubricatedfor Pumps, Compressors,Agitators and Similar Applications.Seal Supply Systemsand Components.

Des

ign

Man

ual

15.3

Contents

The BurgmannDesign Manual forMechanical Seals is now available in theInternet.At www.burgmann.comyou will not only find all the main seals covered by this catalogue but also the CASS Seal Selection Program and a great deal more besides.

Important Note:All the technical references are based onextensive tests and our many years ofexperience. The diversity of possibleapplications means, that they can serveas guide values only. No guarantee canbe given for a specific case unless theexact conditions of application are knowto use and confirmed in a special agree-ment. For particularly critical conditionsof operation, e. g. involving a mixture ofproducts, we recommend you consultwith our specialist engineers. It should benoted that the maximum values of eachoperating parameter cannot be applied atthe same time. Subject to change.

Table of Materialssee inside back cover.

2 Alpha-numericalProduct Indexlisting all the mechanical seals in this catalogue and a

Keyword Index

1B u r g m a n n M e c h a n i c a l S e a l s D e s i g n M a n u a l 1 5 . 3

Contents3 Seal Selection

by Media

25 Mechanical Sealsfor Pumps andCompressors

65 Gas-lubricatedMechanical Seals for Pumps,Mixers, CompressorsGas Supply Systems

81 Mechanical Seals for Agitators, Mixersand Reactors

91 Supply Systemsand Componentsfor liquid-lubricatedMechanical Seals

111 Case Examplesand Recommendationsfor Applications

135 Notes on Design,Installation and Operation

Index

2 B u r g m a n n M e c h a n i c a l S e a l s D e s i g n M a n u a l 1 5 . 3

M78N . . . . . . . . . . . . . . . . . 30, 31M7F . . . . . . . . . . . . . . . . . . . . . 31M7N . . . . . 30, 118, 132, 129, 139M7N/H7N . . . . . . . . . . . . . . 32, 48M7N/M7N . . . . . . . . . . . . . . 32, 48M7S2 . . . . . . . . . . . . . . . . . . . . 31MAA . . . . . . . . . . . . . . . . . 93, 108MAF . . . . . . . . . . . . . . . . . 93, 108MF95N . . . . . . . . . . . . . . . . . . . 39MFL65 . . . . . . . . . . . . . 63, 121,122MFL85F . . . . . . . . . . . . . . . . . . 40MFL85GS . . . . . . . . . . . . 40, 67, 72MFL85N . . 40, 119, 122, 129, 130MFLC-GS . . . . . . . . . . . . . . . . . 120MFLCT80 . . . . . . . . . . . . . . . 40, 41MFLW80... . . . . . . . . . . . . 121, 129MFLW85S20 . . . . . . . . . . . . . . .120MFLWT80 40, 41, 120, 121, 122, 141MG/M3 . . . . . . . . . . . . . . . . . . 130MG1 .36, 37, 123, 124, 130, 131, 133MG12 . . . . . . . . . . . . . . . . . . . . 36MG13 . . . . . . . . . . . . . . . . . . . . 37MG1-45/G6 . . . . . . . . . . . . . . . 119MG1-G6 . . . . . . . . . . . . . . . . . . 133MG1S20 . . . . . . . . . . . . . . . . . . 37MG1S5 . . . . . . . . . . . . . . . . . . 129MG9... . . . . . . . . . . . . . . . . . . . . 34MR..(L)-D . . . . . . . . . . . . . . . . . 86MR33(L)-D . . . . . . . . . . . . 87, 134MR33S1-D . . . . . . . . . . . . . . . . 134MR5LF-D . . . . . . . . . . . . . . . . . . 87MR-D . . . . . . . . . . . . . . . . 86, 133MRF-D17/65 . . . . . . . . . . . . . . 119Mtex-QN,-TN,-QNM,-TNM,-DN 58, 59Mtex-GSD . . . . . . . . . . . . . . . . . 72PDGS . . . . . . . . . . . . . . . . 78, 115QFT1000 . . . . . . . . . . . 94, 95, 127RGS-D1/143 . . . . . . . . . . . . . . . 121RMG12 . . . . . . . . . . . . . . . . . . . 37S14/48 . . . . . . . . . . . . . . . . . . 116S2/245 . . . . . . . . . . . . . . . . . . 116Bulk head 3200 . . . . . . . . . . . . 132SH . . . . . . . . 60, 61, 112, 113, 114 SH-D . . . . . . . . . . . . . . . . . 61, 112SHF . . . . . . . . . . . . . . 60, 124, 126SHFV3/125 . . . . . . . . . . . . . . . . 126SHFV-D . . . . . . . . . . . . . . . 60, 121SHJ92GS4 . . . . . . . . . . . . . . . . 134SHJ97(7)G . . . . . . . . . . . . 43, 134SHPV . . . . . . . . . . . . . . . . 60, 126SHR . . . . . . . . . . . . . . . . . . . . . 52SHV . . . . . . . . . . . . 112, 126, 127SHV-D . . . . . . . . . . . . . . . . . . . 112SMS . . . . . . . . . . . . . . . . . . . . . 79SP 23 ... . . . . . . . . . . . . . . 93, 102SPA . . . . . . . . . . 93, 109, 117, 121SPI . . . . . . . . . . . . . . . . . . 93, 103SPK . . . . . . . . . . . . . . . . . 93, 103SPL . . . . . . . . . . . . . . . . . 93, 103SPN . . . . 93, 102, 104, 114, 117SPS . . . . . . . . . . . . . . 93, 94, 103SPU . . . . . . . . . . . . . . . . . 93, 102STD1 . . . . . . . . . . . . . . . . . . . . . 90Stern tube seal 4600 . . . . . . . . 132TDGS . . . . . . . . . . . . . . . . . . . . . 78TS1000/1016 . . . . . . . . . . . . 93, 96TS2000/2001/2063 . . . 93, 97, 119TS3000/3004/3007/3016 . . . 93, 99TS6050 . . . . . . . . . . . . . . . 93, 100VGM . . . . . . . . . . . . . . . . . . . . 123VTE . . . . . . . . . . . . . . . . . 93, 110WDK . . . . . . . . . . . . . . . . 93, 105WED . . . . . . . . . . . . . 93, 127, 106WEL . . . . . . . . . . . . . . . . . 93, 106ZY . . . . . . . . . . . . . . 93, 107, 123

Agglomerator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134Agitator bead mill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119Ammonia compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . .115API 610 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93, 137, 144API 682 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100, 120, 122Axial runout tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . .141Bottom entry drive . . . . . . . . . . . . . . . . . . . . . . . . . . .89, 119Buffer fluid systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92Buffer fluid unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109Buffer medium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93Calander . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129Chemicals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118Circuit, open and closed . . . . . . . . . . . . . . . . . . . . . . . . . . .92Circulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92Circulation systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93Clamping set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90, 142Coal feed screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117Coal gasification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117Coal mining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116Code for agitator seals . . . . . . . . . . . . . . . . . . . . . . . . . . . .90Code system EN 12756 (DIN 24960) . . . . . . . . . . . . . . . .136Coefficient of friction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Coking oven gas compressor . . . . . . . . . . . . . . . . . . . . . . .115Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76, 77, 115Concentricity tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . .141Condensate generation . . . . . . . . . . . . . . . . . . . . . . . . . . . .99Conical spring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142Contact unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103Cooling coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96Cooling flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90Cooling water consumption . . . . . . . . . . . . . . . . . . . . . . . .138Cutter head seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116Cyclone separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107DIN ISO 5199 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95Distributor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110Double balanced . . . . . . . . . . . . . . . . . . . . . . . . . . .55, 57, 59Drive key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142Elastomer bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . .34, 36Elastomer-free mechanical seal . . . . . . . . . . . . . . . . . . .72, 78External pressurization . . . . . . . . . . . . . . . . . . . . . . . . . . .139Extrusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141Filter dryer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134Flash turbines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115Flow metex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102Flue gas desulphurization . . . . . . . . . . . . . . . . . . . . . . . . .127Fluid quench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92Gap width . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Gas groove shapes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66Gas quench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92Gas separation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68Gas supply system . . . . . . . . .60, 63, 66, 67, 74, 79, 121, 144Glass lined vessels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84Guide sleeve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55Heat dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . .105, 106, 107Hot water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124Installation instructions . . . . . . . . . . . . . . . . . . . . . . . . . . .141Jacket cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139Leakage drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90Level indicator, switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .103Load factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Low-emission seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47Magnet filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108Metal bellows . . . . . . . . . . . . . . . . . . . . . . .40, 58, 63, 72, 78Mineral oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112, 114Multiphase technology . . . . . . . . . . . . . . . . . . . . . . . . . . .112Multipoint injection . . . . . . . . . . . . . . . . . . . . . . . . . . .58, 114Offshore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112Oil-lubricated mechanical seals . . . . . . . . . . . . . . . . . .61, 115Onshore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114Paper industry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128Pipeline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114, 123Polymerization buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90Polypropylene reactor . . . . . . . . . . . . . . . . . . . . . . . . . . . .119Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Power consumption due to friction . . . . . . . . . . . . . . . . . . .139Power stations . . . . . . . . . . . . . . . . . . . . . . . . . .60, 126, 127Pressure booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102, 103Pressure retention unit, control unit . . . . . . . . . . . . . . . . . .110Pressure vessel regulations . . . . . . . . . . . . . . . . . . . . . . . .142Pulp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128Pulper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129Pulpwood grinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128Pump, ammonia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119Pump, aseptic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134Pump, boiler water circulating . . . . . . . . . . . . . . . . . . .60, 126Pump, boiler water feed (booster) . . . . . . . . . . . . . . . .60, 126Pump, condensate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126Pump, cooling water . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132Pump, crude oil loading . . . . . . . . . . . . . . . . . . . . . . . . . .114Pump, dishwasher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38Pump, drinking water . . . . . . . . . . . . . . . . . . . . . . . . . . . .123Pump, eccentric screw . . . . . . . . . . . . . . . . . . . . . . . . . . .119

Pump, feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60, 126Pump, flume water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133Pump, gas oil service . . . . . . . . . . . . . . . . . . . . . . . . . . . .121Pump, gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118Pump, GLP delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121Pump, home and garden . . . . . . . . . . . . . . . . . . . . . . . .26, 38Pump, hot water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125Pump, juice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133Pump, lubricating oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132Pump, main delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113Pump, main feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126Pump, multiphase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112Pump, nitrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120Pump, non-clogging . . . . . . . . . . . . . . . . . . . . . . . . .130, 131Pump, pipeline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114Pump, plastic centrifugal . . . . . . . . . . . . . . . . . . . . . . . . . .119Pump, pot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120Pump, pulp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129Pump, quench oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121Pump, raw sludge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130Pump, refill hand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102Pump, residual oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121Pump, return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120Pump, screw . . . . . . . . . . . . . . . . . . .105, 112, 119, 121, 132Pump, standard centrifugal . . . . . . . . . . . . . . . . . . . . . . . .119Pump, standard chemical . . . . . . . . . . . . . . . . . . . . . . . . .118Pump, submersible-motor . . . . . . . . . . . . . . . . . . . . . . . . .131Pump, sulfolan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121Pump, washing suspension, centrifugal . . . . . . . . . . . . . . .127Pump, water injection . . . . . . . . . . . . . . . . . . . . . . . .113, 114Pumping screw . . . . . . . . . . . . . . . . . . . . . . . . . . .49, 60, 140Quarrying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116Quench (installation) . . . . . . . . . . . . . . . . . . . . . . . . . .5, 93Quench fluid tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94Radial clearance seal . . . . . . . . . . . . . . . . . . . . . . . . . .76, 79Refill unit, automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104Refill unit, mobile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121Refiner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .128Refinery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120Residue combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118Roller bellows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39Roller head sea . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116Rotary joint for water . . . . . . . . . . . . . . . . . . . . . . . . . . . .116Roughness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Safety seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69Screw agitator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133Screw compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115Screw locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141Seal supply system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92Sealing system with no cooling . . . . . . . . . . . . . . . . . . . . .125Seat cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124, 125Seat locking to EN 12756 (DIN 24960) . . . . . . . . . . . . . . .137Seat, hydraulically balanced . . . . . . . . . . . . . . . . . . . . . . . .89Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27, 28, 36, 40, 46Seawater desalination . . . . . . . . . . . . . . . . . . . . . . . . . . . .123Sewage works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132Shrink disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90, 142Shut-down seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90Siding pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Sliding velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Snap locator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142Soiled and sea water . . . . . . . . . . . . . . . . . . . . . . . . . . . .112Special waste incineration . . . . . . . . . . . . . . . . . . . . . . . . .130Split mechanical seal . . . . . . . . . . . . . . . . . . . . . . . . .50, 123Spring protection sleeve . . . . . . . . . . . . . . . . . . . . . . . . . . .54Spring, product-protected . . . . . . . . . . . . . . . . . . . . . . . . . .42Spring, Super-Sinus . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139Steam quench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92Sterile process . . . . . . . . . . . . . . . . . . . . .43, 52, 88, 99, 134Submersible aerator . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130Submersible motor agitator . . . . . . . . . . . . . . . . . . . . . . . .131Sugar industry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133Supply connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90Surface finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141Swimming-pool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136Table of materials . . . . . . . . . . . . . . . . . . . . . .Back cover flapTandem arrangement . . . . . . . . . . . . . . . . . . . . . . . . .127, 131Tank agitator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127Thermosiphon vessel, system . . . . . . . . . . .96, 97, 98, 99, 100Threaded pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142Top entry drive . . . . . . . . . . . . . . . . . . . . . . . . .82, 84, 88, 89Torque transmission, drive . . . . . . . . . . . . . . . . . . .46, 90, 142TTV O-rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142Turbo compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115Turbulence losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138Turbulent mixing reactor . . . . . . . . . . . . . . . . . . . . . . . . . .119Vapour pressure curves . . . . . . . . . . . . . . . . . . . . . . . . . . .140Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142Waste water systems . . . . . . . . . . . . . . . . . . . . . . . .130, 131

Product Index Keyword Index

AGS . . . . . . . . . . . . . . . 67, 74,117AGS461... . . . . . . . . . . . . 74, 75, 84AGS481... . . . . . . . . . . . . . . . 74, 82AGSR . . . . . . . . . . . . 67, 74, 75, 86Cartex-GSD . . . . . . . 56, 67, 70, 121Cartex-SN,-SNO,-QN/TN,-DN,-HDN . . . . . . . . . . . . . . . . . . . . . . . 56, 57

CGS-(K)D . . . . . . . . . . . 67, 69, 119CGS-KN . . . . . . . . . . . . . . . . 68, 69CSR . . . . . . . . . . . . . . . . . . . 69, 79DGS . . . . . . . . . . . . . . . 67, 76, 115DHE . . . . . . . . . . . . . 93, 110, 117DRE . . . . . . . . . . . . . . . . . 93, 110DRU . . . . . . . . . . . . . . . . . 93, 101GSO-D . . . . . . . . . . . . . . . . . 67, 71GSS . . . . . . . . . . . . 67, 74, 121, 119H127G115 . . . . . . . . . . . . . . . . . 44H12N . . . . . . . . . . . . . . . . . . . . 44H17GN . . . . . . . . . . . . . . . 44, 123H427GS1/35 . . . . . . . . . . . . . . 116H74(F)-D . . . 48, 49, 118, 124, 127H74F . . . . . . . . . . . . . . . . . . . . 140H74F1 . . . . . . . . . . . . . . . . . . . 125H74G15 . . . . . . . . . . . . . . . . . . 125H75 . . . . . . . . . . 47, 112, 122, 124H75-D . . . . . . . . . . . . . . . . . . . 112H75F . . . . . . . . . . . . . . . . . 47, 124H75G115 . . . . . . . . . . . . . . . . . 124H75G15 . . . . . . . . . . . . . . . . . . . 46H75K . . . . . . . . . . . . . . . . . . . . . 69H75K/H75F . . . . . . . . . . . . . . . 122H75N . . . . . . . . . . . . . . . . . . . . . 46H75N/H75F1 . . . . . . . . . . . . . . 127H75S2/H75F1 / F2 . . . . . . . . . . 120H75S2/U5-H75F2/55 . . . . . . . . 122H75VN . . . . . . . . . . . . . . . . 47, 69H76(N) . . . . . . . . . . . . . . . . 46, 47H7F . . . . . . . . . . . . . . . . . . 47, 124H7(N) . . . . . . . . . . . . 46, 124, 139H7N/H7F3 . . . . . . . . . . . . . . . . 120H7N/H7N . . . . . . . . . . . . . . . 32, 48H7S2 . . . . . . . . . . . . . . . . . . . . 125H8 . . . . . . . . . . . . . . . . . . . . . . . 64H10 . . . . . . . . . . . . . . . . . . . . . . 64HF(V) . . . . . . . . . . . . . . . . . . . . 124HF-D/93 . . . . . . . . . . . . . . . . . . 114HFV-D4/120 . . . . . . . . . . . . . . .113HGH . . . . . . . . . . . 50, 51, 123, 132HJ42 . . . . . . . . . . . . . . . . . . . . . .43HJ927GN . . . . . . . . . . . . . . . . . . 42HJ92N . . . . . . . . . . . . . . . . . . . 42HJ977GN . . . . . . 42, 129, 130, 133HJ97G . . . . . . . . . . . . . . . . . . . . 42HPS . . . . . . . . . . . . . . . . . 93, 105HR . . . . 52, 53, 127, 128, 129, 130HRC . . . . . . . . . . . . . . 54, 55, 118HRC-GS3000N . . . . . . . 54, 67, 118HRGS-D . . . . . . . . . . . . . . . . . . . 73HRGS-DC . . . . . . . . . . . . . . . . . . 73HRGS-DD . . . . . . . . . . . . . . . . . . 73HRK-D . . . . . . . . . . . . . . . . . . . . 53HRLS1/80 . . . . . . . . . . . . . . . . . 127HRN . . . . . . . . . . . . . . . . . . . . . 62HRSV-D201/254 . . . . . . . . . . . . 116HRZ/MG1 . . . . . . . . . . . . . . . . 133HRZ1 . . . . . . . . . . . . . . . . . . . . 52HS...(L)-D . . . . . . . . . . . . . 88, 139HSH(V)(L)-D . . . . . . . . . . . . . . . 89HSH2/215 . . . . . . . . . . . . . . . . 115HSH-D . . . . . . . . . . . . 89, 117, 128HSHF1 . . . . . . . . . . . . . . . 121, 124HSHFB . . . . . . . . . . . . . . . . . . . 126HSHLU-D . . . . . . . . . . . . . . 89, 117HSHU-D . . . . . . . . . . . . . . . 89, 119HSHV . . . . . . . . . . . . . . . . . . . . 123HSMR..(L)-D . . . . . . . . . . . 86, 134HSSHRS8-D . . . . . . . . . . . . . . . 128HST1/119-TA2 . . . . . . . . . . . . . . 113HTS . . . . . . . . . . . . . . . . . . . . . 125LP(-D) . . . . . . . . . . . . . . . . . . . 129M2N . . . . . . . . . . . . . . . . . . . . . 27M3 . . . . . . . . . . . . . . . . . . . . . 134M32 . . . . . . . . . . . . . . . . . 28, 132M37... . . . . . . . . . . . . . . . . . 28, 29M3N . . . . . . . . . . . . . . . . . . . . . 28M3S . . . . . . . . . . . . . . . . . . . . . 28M451 . . . . . . . . . . . . . . . . . . . . 82M461 . . . . . . . . . . . . . . . . . . . . 84M481 . . . . . . . . . . . . . . . . . 82, 83M48-D . . . . . . . . . . . . . . . . . . . 139M56K(L)-D . . . . . . . . . . . . . . . . 84M7 . . . . . . . . . . . . . . 32, 124, 139M74 . . . . . . . . . . . . . . . . . 30, 132M74-D . . . . . . . . . . . . . . . . . . . . 32M74F(-D) . . . . . . . . . . . . . . 31, 33M74.. . . . . . . . . . . . . . . . . . 31, 123

Media


Med ia3 Seal Selection

by Media


Seal selection by

MediaSeal selection and mate-rial recommendation bymedia.

No. 00No connectionsNo circulation

No. 01No connectionsinternal circulation

Nr. 02Circulation of fluid frompump discharge nozzleto the shaft stuffing box(with internal recycling)Alternative: 01

No. 08Supply of external fluida) to the shaft stuffingbox, with internal recyc-ling into the pumpb) for quenching

No. 09External fluid (e.g. flushing or buffer fluid)to the shaft stuffing boxor quenching. Dischar-ge into an external sy-stem

No. 10Buffer or quench fluidfrom an elevated vessel;circulation of fluid bythermosyphon effect orpumping system

No. 11Buffer or quench fluidfrom a pressurized ves-sel; circulation by ther-mosyphon effect orpumping system

No. 12Buffer fluid from a pres-surized vessel; circula-tion by thermosyphoneffect or pump system;pressure is generated inthe vessel from thepump outlet through apressure accumulator orbooster system (e.g. avessel with diaphragmor pressure transmitter).Inboard sealOutboardseal

Inboard seal Outboard sealInboard seal Outboard sealInboard seal Outboard seal

SealOptional Quench

SealOptional Quench

SealOptional Quench

Leakage Leakage Leakage and piped away

Single mechanical seal arrangement

Double mechanical seal arrangements

Quench arrangements

The recommendations in the media ta-bles on pages 7 to 24 are based on thetypical case of a seal for a horizontalcentrifugal pump. Other types of machine,installation conditions, modes of opera-tion, designers, manufacturers and ope-rators specifications, local regulationsand so on can result in a different choiceof mechanical seal.For complex sealing duties it is always advisable for the user to consult with ourspecialist engineer.

Explanations to columns 1 to 16:

Column 1:Media designation

Designations of materials to be sealedcomply as far as possible with IUPAC rules (IUPAC = International Union ofPure and Applied Chemistry). Where amaterial has several commonly used de-signations and common names, it is listedin accordance with IUPAC rules withcross-referencing of its other names.Designations are listed in alphabetical order.

Column 2:Notes on the media

G = mixture/group (compound)The media is a mixture of various isomersof one substance or it is a group of subs-tances having close chemical ties.

N = natural productThe medium is a natural product or the refined form of a natural product withchanging proportions of its various consti-tuents. = trade markThe constituents of the media or their proportions in the medium are unknownor are not known exactly.

S = collective termThe generalized mechanical seal recom-mendation is no more than a pointer to asuitable mechanical seal.

V = impuritiesThe medium contains large quantities ofimpurities due to the peculiarities of theprocess.

Column 3:Concentration

= The media normally occurs in pureform and (as in the case of gases andother media requiring a double mechani-cal seal) the concentration has no bear-ing on the mechanical seal selection.

Seal selection by

Media

B u r g m a n n M e c h a n i c a l S e a l s D e s i g n M a n u a l 1 5 . 310

1 2 3 40 5 6 7 8 10 11 12 1300 14 15 16

Calcium carbonate Lime powder suspension

Calcium chlorate Ca(ClO3)2

Med

ia

B u r g m a n n M e c h a n i c a l S e a l s D e s i g n M a n u a l 1 5 . 3 11

Citric acid C6H8O7

Seal selection by

Media


Dibutyl phthalate (DBP) Phthalic acid esters

Dichlorobenzenes:1,2-Dichlorobenzene

(ortho-dichlorobenzene) C6H4Cl2

Med

ia


EEdible oil N

Seal selection by

Media


Formamide CH3NO

Med

ia


Hexachloroethane (perchloroethane) C2Cl6

Seal selection by

Media


LLacquer solvents S

Med

ia


MDEA N-Methyl-2,2'-iminodiethanole C5H13NO2

MEA N-Methyl ethanolamine C3H9NOMeat juice, meat broth N

Seal selection by

Media


Naphthol dyes

Med

ia


Perchlorobenzene Hexachlorobenzene

Perchloroethane Hexachloroethane

Perchloroethylene Tetrachloroethylene

Perhydrol Hydrogen peroxide,30-% solution

Petrol (gasoline, gas) unleaded,regular and supergrade G

Seal selection by

Media


Potassium chloride KCl

Med

ia


R 1112a 20 D1 11 1 S B M4 G G 1,4

R 1113 >40 D1 11 1 S B M4 G G 1,4 ga 158 28 (+)R 1122 >40 D1 11 1 S B M4 G G 1,4 ga 138 18 (+)R 1132 a >40 D1 11 1 S B M4 G G C3,1,4 ga 144 86 (+)RC 318

Seal selection by

Media


Soiled water WaterSoot-water mixture

Med

ia


Terphenyls (diphenyl benzenes): C18H14m-Terphenyl (1,3-diphenyl benzene) C18H14 Sch

Seal selection by

Media


Vinyl chloride C2H3Cl

Standard


Standard Sea ls

25 Mechanical Sealsfor Pumps and Compressors

Plain shafts, rotating spring,unbalancedM2N . . . . . . . . . . . . . . . . . . . . . . . 27M3N . . . . . . . . . . . . . . . . . . . . . 28/29M7N . . . . . . . . . . . . . . . . . . . . . 30/31M74-D . . . . . . . . . . . . . . . . . . . 32/33MG9 . . . . . . . . . . . . . . . . . . . . . 34/35MG1 . . . . . . . . . . . . . . . . . . . . . 36/37MF95N . . . . . . . . . . . . . . . . . . . . . 39

Plain shafts, rotating spring,balancedMFL85N . . . . . . . . . . . . . . . . . . 40/41HJ92N . . . . . . . . . . . . . . . . . . . 42/43

Stepped shafts, rotating spring,balancedH12N . . . . . . . . . . . . . . . . . . . . 44/45H7N . . . . . . . . . . . . . . . . . . . . . 46/47H74-D . . . . . . . . . . . . . . . . . . . . 48/49

Stationary spring, balancedHR . . . . . . . . . . . . . . . . . . . . . . 52/53HRC..N . . . . . . . . . . . . . . . . . . . 54/55Cartex . . . . . . . . . . . . . . . . . . . . 56/57Mtex . . . . . . . . . . . . . . . . . . . . . 58/59SH . . . . . . . . . . . . . . . . . . . . . . . . . 60SH (-D) . . . . . . . . . . . . . . . . . . . . . 61HRN . . . . . . . . . . . . . . . . . . . . . . . . 62MFL65 . . . . . . . . . . . . . . . . . . . . . . 63H10/H8 . . . . . . . . . . . . . . . . . . . . . 64

Split sealHGH . . . . . . . . . . . . . . . . . . . . . 50/51

26 B u r g m a n n K o n s t r u k t i o n s m a p p e 1 5 . 3

W e l c o m e t o o u r s e a l i n g w o r l dw w w . b u r g m a n n . c o m

Everythingunder controlaround the clock:Seal diagnosisin pumps

You never used to know thata mechanical seal wasdamaged until you saw itsleakage, which was usuallytoo late. Today, permanentseal monitoring by the Burg-mann MDS guards againstunwelcome surpri-ses. Because you alwaysknow the seals currentstate of performance.A simple warning system plus automatic deactivationof the pump if required provides additional safety.


Single sealUnbalancedConical springDependenton direction of rotationTo EN 12756*The M2 mechanical seal range featuresa spring loaded solid carbon graphite sealface. They are cost effective for basicapplications such as circulating pumpsfor water and heating systems.

Operating limits (see note on page 1)

d1 = 6 ... 38 mmm0.25" ... 1.5"p1 = 10 bar 145 PSIt = 20 ... 180 C m4 F ... 355 Fvg = 15 m/s 50 ft/sAxial movement: 1.0 mm

M2NItem Part no. Descriptionno. to DIN

242501.1 472 Seal face1.2 412.1 O-ring1.3 474 Thrust ring1.4 478 Righthand spring1.4 479 Lefthand spring2 475 Type G9 stationary seat3 412.2 O-ring

For plain shafts, spring rotating

M2N

M2N

Seal designations

Materials (to EN 12756)

Seal face: BStationary seats G4: Q1; S (Q1; V)

G6: Q1; S (Q1; V)G9: Q1; Q2; S; V

Stationary seatsRotating unit G4 G6 G9M2 M2 M2N4 M2N

Stationary seats

G4

d1f

6*8*

10*12*14*15*16*18*20*22*24*25*26*28*30*32*35*38*

d3151820222527273032353840414347485356

d6

171921

232729313334

37

d7

212325

273335373940

43

d83333333333

d1111.815.515.517.520.520.522.024.029.529.532.032.034.036.039.242.246.249.2

d1216.019.219.221.624.624.628.030.035.035.038.038.040.042.045.048.052.055.0

db8

1113161819212326283031323537394347

l1N

404040

404545455050

50

l3

17.517.517.5

19.520.522.023.525.026.5

26.5

l5f

1.51.51.5

1.52.02.02.02.02.0

2.0

l64444555555

l7f

8.58.58.5

8.59.09.09.09.09.0

9.0

l8m

17.517.517.5

17.519.519.519.519.519.5

19.5

l9m

10.010.010.0

10.011.511.511.511.511.5

11.5

l10

7.57.57.5

7.58.58.58.58.58.5

8.5

l12 l6.5*8.0*7.5*8.0*8.0*7.5*8.5*9.0*8.5*8.5*8.5*8.5*9.0*

10.0*11.5*13.0*13.5*13.0*

l145.67.06.67.0*7.0*6.67.58.07.57.57.57.58.09.0

10.510.511.010.3

l151.21.21.21.21.21.21.51.51.51.51.51.51.51.51.51.51.51.5

l163.83.83.83.83.83.85.05.05.05.05.05.05.05.05.05.05.05.0

l2110.915.515.916.016.017.419.020.522.023.525.026.526.526.525.028.528.532.0

l28

6.66.66.6

6.67.57.57.57.57.5

7.5

b

8888888888

Rn

1.21.21.21.21.21.21.51.51.51.51.51.51.51.51.51.51.51.5

*) Installation length differs from G4-seats

G6EN 12756

Unquoted dimensions as per Item 2

1) l3 valid for M2N,1) for M2 series l21 is valid (see table)

l 22

d 13


M3N

Single sealUnbalancedConical springDependenton direction of rotationTo EN 12756*The M3 mechanical seals are immenselypopular. Extremely rugged and reliable,they cover a wide spectrum of applica-tions in water pumps, sewage pumps,submerged pumps, chemical pumps, etc.


d1 = 6 ... 80 mm m0.25" ... 3.125"(M37G from d1 = 16 mm /M37 up to d1 = 55 mm)

p1 = 10 bar m145 PSIt = 20 ... 180 C m4 F... 355 F

(M37 up to 120 C)vg = 10 (15) m/s m33 (50) ft/sAxial movement: 1.0 mm

M3NItem Part no. Descriptionno. to DIN

242501.1 472 Seal face1.2 412.1 O-ring1.3 474 Thrust ring1.4 478 Righthand spring1.4 479 Lefthand spring2 475 Type G9 stationary seat3 412.2 O-ring


G4

M32Item nos and descriptions as for typeM3N, but with the seal face (carbon)shrink-fitted into the seal face carrier(Item no. 1.1).

Stationary seats

Unquoted dimensions as for Item 2.

G13

G6 (G30)EN 12756

G9EN 12756

Combination of materials and seal types

Gleit-ringe

1) l3 valid for M3...N-types1) for M3-series l21 is valid (see table).

Stationary seatsG4 G13 G63) G9

S V Q2 A;B S V Q1 A;B V Q1(Q2) (Q2)

M3 (S) M3 M3N M32 (A;B) M32 M32 M32 M32N4 M32N4 M32N4 M32N M32NM37 (U1) M37 M37 M37N4 M37N M37NM37G M37G M37G M37GN4 M37GN M37GN(Q12; Q22;U22)

3) Stationary seat G6 is also available in materials A and B (as style G30) (longer overall length than G6!).All material designations according to EN 12756. See back cover.

Rotatingunit(sealface)

l23

d 13


M3N

M37(d1 max. 55 mm)Item nos and descriptions as for typeM3N, but with the seal face brazed(tungsten carbide) to the seal face carrier(Item no. 1.1).

M37G(d1 min. 16 mm)Item nos and descriptions as for typeM3N, but with the seal face shrink-fitted (silicon carbide) into the seal facehousing (Item no. 1.1).

d314181921232426293133353637404346474953565959616466697176788384889098

100

d6

171921

232729313334

37394242444951

5456596265677072757781838895

d7

212325

273335373940

43454848505658

61636670737578808385909297

105

d8333333333333334444444444444444

d111)

11.515.515.517.520.520.522.024.029.529.532.032.034.036.039.242.2

46.249.252.253.3

55.359.760.8

66.569.571.5

76.582.783.090.295.2

d121)

16.019.219.221.624.624.628.030.035.035.038.038.040.042.045.048.0

52.055.058.062.0

64.068.469.3

75.478.480.4

85.491.592.099.0

104.0

d1316182022242526313436383940424446474954565859616466697178798385889098

103

db8

11131618192123262830313235373940434549525255586164666971747780838893

l1N

404040

404545455050

50505555555555

6060606070707070708080808090

l3m

15.516.016.5

18.019.522.021.523.526.5

26.526.528.528.528.533.536.0

38.539.546.045.047.049.055.055.055.055.055.057.062.061.8

l5f

1.51.51.5

1.52.02.02.02.02.0

2.02.02.02.02.02.02.0

2.02.02.02.52.52.52.52.52.52.52.52.52.53.0

l6444455555555556666666666667777

l7f

8.58.58.5

8.59.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.0

l8n

17.517.517.5

17.519.519.519.519.519.5

19.519.519.519.519.522.022.0

22.022.022.023.023.023.023.023.023.023.026.026.026.026.2

l9m

10.010.010.0

10.011.511.511.511.511.5

11.511.511.511.511.514.014.0

14.014.014.015.015.015.015.015.015.015.018.018.018.018.2

l10

7.57.57.5

7.58.58.58.58.58.5

8.58.58.58.58.5

10.010.0

10.010.010.010.512.012.012.012.012.012.012.512.512.513.0

l11f9.09.09.0

10.010.011.011.512.512.512.512.512.513.014.014.014.0

14.514.514.517.0

17.017.017.0

18.018.018.0

18.019.018.018.019.0

l126.58.07.56.56.57.58.59.08.58.58.58.59.0

10.011.511.512.012.011.311.813.213.212.812.812.813.514.514.514.514.214.214.914.215.216.2

l137.17.17.17.67.68.69.0

10.09.59.59.59.5

10.011.011.011.0

11.511.511.514.3

14.314.314.3

15.315.315.3

15.316.015.315.316.3

l145.67.06.65.65.66.67.58.07.57.57.57.58.09.0

10.510.5

11.010.310.812.0

11.611.611.6

13.313.313.3

13.013.713.014.015.0

l151.21.21.21.21.21.21.51.51.51.51.51.51.51.51.51.5

1.51.51.52.02.02.02.02.0

2.02.02.0

2.02.02.02.02.0

l163.83.83.83.83.83.85.05.05.05.05.05.05.05.05.05.0

5.05.05.06.0

6.06.06.0

6.06.06.0

6.06.06.06.06.0

l21f10.515.515.515.515.515.517.518.520.021.523.024.524.524.524.528.0

.28.031.034.035.0

.36.542.043.0

.47.050.051.0

.52.053.054.055.058.0

l22n11.916.916.917.417.417.419.520.522.023.525.026.526.526.525.028.5

28.532.234.737.3

39.244.745.7

49.052.055.0

54.355.356.356.359.3

l23s

16.5

16.518.019.020.522.023.523.524.524.528.0

28.031.034.035.0

36.542.043.0

47.050.051.0

52.052.754.054.058.0

l28

6.66.66.6

6.67.57.57.57.57.5

7.57.57.57.57.59.09.0

9.09.09.09.5

11.011.011.011.011.011.011.311.311.312.0

b2)

(8)(8)(8)

(8)(8)(8)(8)(8)(8)

(8)(8)(8)(8)(8)7,5(8)

7,5(8)(8)(8)8,0(8)(8)(8)(8)(8)(8)(10)(10)

10,0

Rf1.21.21.21.21.21.21.51.51.51.51.51.51.51.51.51.51.51.51.51.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52.5

1) Fitting dimensions d11 and d12 only apply to type M37G with D1 >16 mm2) Dimensions in brackets lie either above or below L1N*) According to EN 12756

For the spring-loaded units the following measures apply:M3-series: I21; M32-series: I22; M37..-series: I23; M3..N-series: I3.

d16*8*

10*12*14*15*16*18*20*22*24*25*26*28*30*32*33*35*38*40*42*43*45*48*50*53*55*58*60*63*65*68*70*75*80*

4 screws eachoffset 90


Combination of materials

For plain shafts, spring(s) rotating

M7N

Single sealUnbalancedIndependentof direction of rotationTo EN 12756*The M7 mechanical seal range is de-signed for universal application and idealsuited for standardisation. The loosely in-serted seal faces are easily exchanged,permitting all combinations of materialsand stock rationalisation. With Super-Sinus spring (see page 139).


d1 = 14 ... 200 mm m0.55 ... 8p1 = 16 (25) bar m230 (360) PSIt = 50 ... 220 C

= 58 F ... 430 Fvg = 20 m/s m66 ft/s

Axial movement:d1 up to 25 mm: 1.0 mmd1 28 bis 63 mm: 1.5 mmd1 ab 65 mm and above: 2.0 mm

Seal code explanation

d1 = 53 mm Seal face made of cast Cr-steel (S) Type G13 stationary seat made of

carbon graphite (B) Viton O-rings (V) Metal parts including spring material

1.4571 (G) Rotating unit M74 M74/53G13SBVGGThe basic description M74N/53 SBVGGindicates a G9 seat, installation dimen-sions to EN 12756.

M7N(d1 = max. 100 mm)

Item Part no. Descriptionno. to DIN

242501.1 472 Seal face1.2 485 Drive collar1.3 474 Thrust ring1.4 412.1 O-ring1.5 477 Spring1.6 904 Set screw2 475 Type G9 stationary seat3 412.2 O-ring

G4

M74Dimensions, item nos and descriptionsas for M7N, but with multiple springs(Item no. 1.5). Preferably for d1 >100mm.

Stationary seats

Unquoted dimensions as for item no. 2

G13

G9EN 12756 (DIN 24960)

G6EN 12756(DIN 24960)

1) d1 > 100 mm : 302) d1 > 100 : +0,13) d1 > 100 : H7

4 set screws with cone points(standardarrangement).

Torque transmissiond1 >100 mm

Only M78N:G9

S V Q1B A Q1

(Designations to EN 12756, see insidethe back cover of this manual)

Stationary seals

G4 G13mmmG9 G6

Q1 A;B A;B Q1 Q1(Q2) (Q2) (Q2)

S V Q1 Q2

Seal faces


M7N

M7Fd1 max. 100 mm

M74Fd1 = 14 ... 200 mm

Dimensions, item nos and descriptionsas for type M7N, but with pumpingscrew. Dependent on direction ofrotation!

M7 S2d1 max. 100 mm

M74 S2d1 = 28 ... 200 mm

Dimensions, item nos and descriptionsas for type M7N, but with drive key.(without item no. 1.6)

M78Nd1 = 18 ... 100 mmt max. 180 C

Items nos, description and unspecifieddimensions as for M7N. Design of therotating portion especially for secondarysealing element made of PTFE (T).

d1f14*16*18*20*22*24*25*28*30*32*33*35*38*40*43*45*48*50*53*55*58*60*63*65*68*70*75*80*85*90*95*

100*105*110*115*120*125*130*135*140*145*150*155*160*165*170*175*180*185*190*195*200*

d3252733353739404345474850555760626567707279818486899199

104109114119124138143148153158163168173178183191196201206211216221226231236

d6n21.023.027.029.031.033.034.037.039.042.042.044.049.051.054.056.059.062.065.067.070.072.075.077.081.083.088.095.0

100.0105.0110.0115.0122.2128.2136.2138.2142.2146.2152.2156.2161.2168.2173.2178.2183.2188.2193.2207.5212.5217.5222.5227.5

d7n25.027.033.035.037.039.040.043.045.048.048.050.056.058.061.063.066.070.073.075.078.080.083.085.090.092.097.0

105.0110.0115.0120.0125.0134.3140.3148.3150.3154.3158.3164.3168.3173.3180.3185.3190.3195.3200.3205.3219.3224.3229.3234.3239.3

d83333333333334444444444444444444455555555555555555555

d1120.522.024.029.529.532.032.036.039.242.244.246.249.252.253.355.359.760.863.866.569.571.574.576.582.783.090.295.2

100.2105.2111.6114.5

d1224.628.030.035.035.038.038.042.045.048.050.052.055.058.062.064.068.469.372.375.478.480.483.485.491.592.099.0

104.0109.0114.0120.3123.3

d2416182022242627303234353740424547505255576062656770727782879297

102108113118123128133138143148153158163168173178183188193198203

d31

32343638394244464749545659616466697178808385889099

104109114119124

ds3436384042444547495151545961656669717576838588959395

105109114119124129143148153158163168173178183188196201206211216221226231236241

l1Kl35.035.037.537.537.540.040.042.542.542.542.542.545.045.045.045.045.047.547.547.552.552.552.552.552.560.060.060.060.065.065.065.067.067.067.067.067.067.067.067.067.069.080.080.080.080.080.084.084.084.084.084.0

l325.025.026.026.026.028.528.531.031.031.031.031.031.031.031.031.031.032.532.532.537.537.537.537.534.542.042.041.841.846.847.847.847.047.047.047.047.047.047.047.047.047.056.056.056.056.056.056.056.056.056.056.0

l5i1.51.52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.52.52.52.52.52.52.52.52.52.53.03.03.03.03.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.0

l644555555555566666666666677777777

1010101010101010101012121212121212121212

l7i8.58.59.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.0

l8n17.517.519.519.519.519.519.519.519.519.519.519.522.022.022.022.022.023.023.023.023.023.023.023.026.026.026.026.226.226.225.225.230.030.030.030.030.030.030.030.030.032.034.034.034.034.034.038.038.038.038.038.0

l9n10.010.011.511.511.511.511.511.511.511.511.511.514.014.014.014.014.015.015.015.015.015.015.015.018.018.018.018.218.218.217.217.220.020.020.020.020.020.020.020.020.022.024.024.024.024.024.028.028.028.028.028.0

l107.57.58.58.58.58.58.58.58.58.58.58.5

10.010.010.010.010.010.512.012.012.012.012.012.012.512.512.513.015.015.015.015.0

l11i10.011.512.512.512.512.512.514.014.014.014.514.514.514.517.017.017.017.017.018.018.018.018.018.019.018.018.019.019.019.020.020.0

l12i6.58.59.08.58.58.58.5

10.011.511.512.012.011.311.813.212.812.812.813.514.514.514.514.214.214.914.215.216.216.016.017.017.0

l13i7.69.0

10.09.59.59.59.5

11.011.011.011.511.511.511.514.314.314.314.314.315.315.315.315.315.316.015.315.316.316.316.317.317.3

l14i5.67.58.07.57.57.57.59.0

10.510.510.511.010.310.812.011.611.611.612.313.313.313.313.313.013.713.014.015.014.814.815.815.8

l151.21.21.51.51.51.51.51.51.51.51.51.51.51.52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.0

l163.83.85.05.05.05.05.05.05.05.05.05.05.05.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.0

l286.66.67.57.57.57.57.57.57.57.57.57.59.09.09.09.09.09.5

11.011.011.011.011.011.011.311.311.312.014.014.014.014.0

b44556666666666666666888888888

1010101010101010101010101012121212121212121212

fi66777888888888888888999999

1010101010101010101010101010101012121212121212121212

f1f

3.53.53.53.53.54.04.04.04.04.04.04.04.04.04.04.54.54.55.55.55.55.54.05.55.55.55.58.08.08.0

mxM5M5M5M5M5M5M5M6M6M6M6M6M6M6M6M6M6M6M6M6M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8

10101010101313131313131313131313131313131313131313161616162222222020202020202020202024242424242424242424

pmax. td1.51.51.11.11.51.51.51.51.51.51.51.51.51.51.51.51.51.51.51.51.91.91.91.91.91.91.91.91.92.32.32.32.32.32.32.32.32.32.32.32.32.32.12.12.12.12.12.12.12.12.12.1 d 1

> 2

00 o

n re

ques

t

d1 = 68: mx = M6Drive keyDIN 6885


Torque transmission

For plain shafts, springs rotating

M74-D

Double sealUnbalancedIndependentof direction of rotationMultiple springsDouble seals in the M74-D series havethe same design-features as the M7family of single seals (easy-to-replaceseal faces, etc.). Apart from the installati-on length of the drive collar, all fittingdimensions (d1 100 mm 2.0 mm

Combination of materials

Dimensions are identical throughout theM7 series, so it is possible to use thesame face materials as for type M7N(see page 30).

Double seals to EN 12756

EN specifies single seals in a back-to-back arrangement. It is possible, there-fore, to choose from the following combi-nations: unbalanced/unbalanced (e. g. M7N/M7N) balanced/balanced (e. g. H7N/H7N) unbalanced/balanced (e. g. M7N/H7N). Please consult the single-sealtables for dimensions.

Spring loaded drive pin: M74-D22

drive pin 1.4.1 disk 1.4.2 thrust spring 1.4.3

For d1 >100 mm: 4 set screws withcone points (standard arrangement)

2 )

3 )

1) d1 > 100 mm: 302) d1 > 100: +0,13) d1 > 100: H7



M74

-DM74F-DDimensions, item nos and descriptionsas for type M74-D, but with pumpingscrew (Item no. 1.4). Dependent ondirection of rotation!Torque transmission via set screws withcone points.

d11820222425283032333538404345485053555860636568707580859095

100105110115120125130135140145150155160165170175180185190195200

d333353739404345474850555760626567707279818486899199

104109114119124138143148153158163168173178183191196201206211216221226231236

d6f27.029.031.033.034.037.039.042.042.044.049.051.054.056.059.062.065.067.070.072.075.077.081.083.088.095.0

100.0105.0110.0115.0122.2128.2136.2138.2142.2146.2152.2156.2161.2168.2173.2178.2183.2188.2193.2207.5212.5217.5222.5227.5

d7f33.035.037.039.040.043.045.048.048.050.056.058.061.063.066.070.073.075.078.080.083.085.090.092.097.0

105.0110.0115.0120.0125.0134.3140.3148.3150.3154.3158.3164.3168.3173.3180.3185.3190.3195.3200.3205.3219.3224.3229.3234.3239.3

d833333333334444444444444444444455555555555555555555

d944444444444444444455555555555577777777777777777777

d11i

24.029.529.532.032.036.039.242.244.246.249.252.253.355.359.760.863.866.569.571.574.576.582.783.090.295.2

100.2105.2111.6114.5

d1230.035.035.038.038.042.045.048.050.052.055.058.062.064.068.469.372.375.478.480.483.485.491.592.099.0

104.0109.0114.0120.3123.3

ds

42444547495151545961656669717576838588959395

105109114119124129143148153158163168173178183188196201206211216221226231236241

l1g

61.061.061.061.061.062.062.062.062.062.069.070.070.070.070.073.073.073.086.086.085.085.091.092.092.092.592.592.590.590.5

108.0110.0110.0110.0110.0110.0110.0110.0110.0114.0127.0127.0127.0127.0127.0135.0135.0135.0135.0135.0

l33838383838393939393941424242424343435656555555565656565656566870707070707070707079797979797979797979

l4f19.019.019.019.019.019.519.519.519.519.520.521.021.021.021.021.521.521.528.028.027.527.527.528.028.028.028.028.028.028.034.035.035.035.035.035.035.035.035.035.039.539.539.539.539.539.539.539.539.539.5

l52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.52.52.52.52.52.52.52.52.52.53.03.03.03.03.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.0

l6555555555566666666666677777777

1010101010101010101012121212121212121212

l9999999999999999999999999999999

l8f

19.519.519.519.519.519.519.519.519.519.522.022.022.022.022.023.023.023.023.023.023.023.026.026.026.026.226.226.225.225.230.030.030.030.030.030.030.030.030.032.034.034.034.034.034.038.038.038.038.038.0

l9f

11.511.511.511.511.511.511.511.511.511.514.014.014.014.014.015.015.015.015.015.015.015.018.018.018.018.218.218.217.217.220.020.020.020.020.020.020.020.020.022.024.024.024.024.024.028.028.028.028.028.0

l108.58.58.58.58.58.58.58.58.58.5

10.010.010.010.010.010.512.012.012.012.012.012.012.512.512.513.015.015.015.015.0

l11i

12.512.512.512.512.514.014.014.014.514.514.514.517.017.017.017.017.018.018.018.018.018.019.018.018.019.019.019.020.020.0

l129.08.58.58.58.5

10.011.511.512.012.011.311.813.212.812.812.813.514.514.514.514.214.214.914.215.216.216.016.017.017.0

l1310.09.59.59.59.5

11.011.011.011.511.511.511.514.314.314.314.314.315.315.315.315.315.316.015.315.316.316.316.317.317.3

l148.07.57.57.57.59.0

10.510.510.511.010.310.812.011.611.611.612.313.313.313.313.313.013.713.014.015.014.814.815.815.8

l151.51.51.51.51.51.51.51.51.51.51.51.52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.0

555555555555666666666666666666

l16 l287.57.57.57.57.57.57.57.57.57.59.09.09.09.09.09.5

11.011.011.011.011.011.011.311.311.312.014.014.014.014.0

l3117.017.017.017.017.017.517.517.517.517.518.519.019.019.019.019.519.519.523.523.524.524.524.523.525.525.525.025.525.025.030.531.531.531.531.531.531.531.531.531.535.535.535.535.535.535.535.535.535.535.5

l351515151515151515151515151515151515151919191919191919191919192222222222222222222222222222222222222222

mxM5M5M5M5M5M6M6M6M6M6M6M6M6M6M6M6M6M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8M8

tg

3.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.53.5


For plain shafts, rotating spring

MG9

Single sealUnbalancedIndependent of directionof rotationElastomer bellowsThe MG9 is (US Patent No. 6,220,601)designed for medium-range pressuresand loads. Within its operating limits itcan be put to universal use in pumpsthanks to the following attributes: for all fitting lengths only one bellows

unit for each size of diameter length compensation by means of a

conical spring of required length, withsingle easy-to-fit clamp-type connector

no need to change existing pumpinstallation spaces

smallest external diameter of all bel-lows seals on the world market

no torsion on bellows and spring no adhesive joints self-centering conical spring (suppor-

ted directly on the shaft collar withoutan additional washer)

technical approval issued by a top-name, global pump manufacturer

compact, unsplit bellows unit with sta-tionary seal face for reliable installati-on and operation (deposits betweenthe bellows and the seal face are im-possible, ruling out all risk of misalign-ment)

St

anda

rd

Spec

ial

SeatsMG9Item Part No. Description

DIN24250

1.1 472 Seal face1.2 481 Bellows1.3 485 Driver collar1.4 484.1 L ring1.5 474 Washer2 477 Spring3 475 Seat4 412 Corner sleeve


d1 = 10 ... 100 mm 0.375 ... 4p1*= 8 (12) bar 116 (174) PSIt* = 20 ... +90 (140) C

= 4 ... +194 (284) Fvg = 10 m/s 33 ft/spermissible axial movement: 0.5 mm*) dependent on the medium, size andmaterials

Materials

Seal component Material(DIN)

Seal face Carbon (B) SiC (Q1)

Seat Ceramic (V) SiC (Q1)

Bellows / Perbunan (P) Corner Viton (V) sleeve EPDM (E) Spring 1.4310 (F)

1.4571 (G) Driver collar / 1.4301 (F) L ring 1.4571 (G)

1.4401

G50Euro standard

G55US standard

G60EN 12756(DIN 24960)


d1 d6 d7 d14 d16 da dbi l1t l1K l1N l1S l5i l6 l17 l28 l2910 17 21 11.0 24.60 19.6 13.0 53.0 32.5 40 34.0 1.5 4 7.5 6.6 9.012 19 23 13.5 27.80 21.6 15.0 53.0 32.5 40 34.0 1.5 4 7.5 6.6 9.014 21 25 17.0 30.95 24.0 18.0 54.5 35.0 40 35.5 1.5 4 9.0 6.6 10.515 17.0 30.95 25.0 19.0 54.5 35.5 9.0 10.516 23 27 17.0 30.95 26.5 20.0 54.5 35.0 40 35.5 1.5 4 9.0 6.6 10.518 27 33 20.0 34.15 29.0 22.0 54.5 37.5 45 35.5 2.0 5 9.0 7.5 10.520 29 35 21.5 35.70 31.5 24.5 54.5 37.5 45 35.5 2.0 5 9.0 7.5 10.522 31 37 23.0 37.30 33.0 27.0 54.5 37.5 45 35.5 2.0 5 9.0 7.5 10.524 33 39 26.5 40.50 37.0 29.0 54.5 40.0 50 35.5 2.0 5 9.0 7.5 10.525 34 40 26.5 40.50 38.0 30.0 54.5 40.0 50 35.5 2.0 5 9.0 7.5 10.528 37 43 29.5 47.65 41.0 34.0 72.0 42.5 50 45.0 2.0 5 10.5 7.5 12.030 39 45 32.5 50.80 43.0 36.0 72.0 42.5 50 45.0 2.0 5 10.5 7.5 12.032 42 48 32.5 50.80 45.0 38.0 72.0 42.5 55 45.0 2.0 5 10.5 7.5 12.033 42 48 36.5 54.00 46.0 39.0 72.0 42.5 55 45.0 2.0 5 10.5 7.5 12.035 44 50 36.5 54.00 48.0 41.0 72.0 42.5 55 45.0 2.0 5 10.5 7.5 12.038 49 56 39.5 57.15 52.5 44.5 72.0 45.0 55 45.0 2.0 6 10.5 9.0 12.040 51 58 42.5 60.35 55.5 47.5 72.0 45.0 55 45.0 2.0 6 10.5 9.0 12.043 54 61 46.0 63.50 58.5 50.5 83.0 45.0 60 53.0 2.0 6 10.5 9.0 12.045 56 63 46.0 63.50 60.5 52.5 83.0 45.0 60 53.0 2.0 6 10.5 9.0 12.048 59 66 49.0 66.70 64.0 56.0 83.0 45.0 60 53.0 2.0 6 10.5 9.0 12.050 62 70 52.0 69.85 66.0 58.0 84.5 47.5 60 54.5 2.5 6 12.0 9.5 13.553 65 73 55.5 73.05 69.0 61.0 84.5 47.5 70 54.5 2.5 6 12.0 11.0 13.555 67 75 58.5 76.20 71.0 63.0 84.5 47.5 70 54.5 2.5 6 12.0 11.0 13.558 70 78 61.5 79.40 76.0 66.0 84.5 52.5 70 54.5 2.5 6 12.0 11.0 13.560 72 80 61.5 79.40 78.0 68.0 84.5 52.5 70 54.5 2.5 6 12.0 11.0 13.563 75 83 82.0 71.5 52.5 70 2.5 6 11.0 65 77 85 68.0 92.10 84.0 73.5 86.0 52.5 80 65.0 2.5 6 14.5 11.0 16.068 81 90 71.0 95.25 87.0 76.5 86.0 52.5 80 65.0 2.5 7 14.5 11.3 16.070 83 92 71.0 95.25 89.0 79.0 86.0 60.0 80 65.0 2.5 7 14.5 11.3 16.075 88 97 77.5 101.60 95.0 85.0 89.0 60.0 80 68.0 2.5 7 14.5 11.3 16.080 95 105 84.0 114.30 101.5 91.5 99.0 60.0 90 76.0 3.0 7 18.5 12.0 20.085 100 110 87.0 117.50 99.0 60.0 90 76.0 3.0 7 18.5 14.0 20.090 105 115 93.5 123.85 111.5 103.0 103.0 65.0 90 79.0 3.0 7 18.5 14.0 20.095 110 120 96.5 127.00 103.0 65.0 90 79.0 3.0 7 18.5 14.0 20.0

100 115 125 103.0 133.35 122.5 114.0 106.0 65.0 90 82.0 3.0 7 18.5 14.0 20.0

d1 d61 d71 da db il14 l15 l41 l51 l610.375 0.625 0.875 0.740 0.492 1.125 1.500 0.313 0.050 0.2500.500 0.750 1.000 0.878 0.630 1.125 1.500 0.313 0.050 0.2500.625 0.937 1.250 1.043 0.787 1.281 1.718 0.406 0.050 0.3440.750 1.062 1.375 1.161 0.905 1.281 1.718 0.406 0.050 0.3440.875 1.187 1.500 1.299 1.063 1.343 1.781 0.406 0.050 0.3441.000 1.312 1.625 1.496 1.200 1.437 2.000 0.437 0.050 0.3751.125 1.437 1.750 1.634 1.358 1.500 2.062 0.437 0.050 0.3751. 250 1.563 1.875 1.772 1.496 1.500 2.062 0.437 0.050 0.3751.375 1.687 2.000 1.890 1.614 1.562 2.124 0.437 0.050 0.3751.500 1.813 2.125 2.067 1.752 1.562 2.124 0.437 0.050 0.3751.625 2.000 2.375 2.244 1.909 1.875 2.500 0.500 0.050 0.4371.750 2.125 2.500 2.382 2.028 1.875 2.500 0.500 0.050 0.4371.875 2.250 2.625 2.520 2.165 2.000 2.625 0.500 0.050 0.4372.000 2.375 2.750 2.598 2.283 2.000 2.625 0.500 0.050 0.4372.125 2.375 3.000 2.795 2.421 2.249 2.937 0.562 0.050 0.5002.250 2.437 3.125 2.992 2.559 2.249 2.937 0.562 0.050 0.5002.375 2.563 3.250 3.071 2.697 2.375 3.062 0.562 0.050 0.5002.500 2.687 3.375 3.228 2.834 2.375 3.062 0.562 0.050 0.5002.625 2.812 3.375 3.307 2.953 2.562 3.375 0.625 0.100 0.5622.750 2.937 3.500 3.504 3.110 2.562 3.375 0.625 0.100 0.5622.875 3.062 3.750 3.642 3.228 2.687 3.500 0.625 0.100 0.5623.000 3.187 3.875 3.760 3.366 2.687 3.500 0.625 0.100 0.5623.125 3.312 4.000 4.000 3.583 2.968 3.906 0.781 0.100 0.6563.250 3.437 4.125 2.968 3.906 0.781 0.100 0.6563.375 3.562 4.250 2.968 3.906 0.781 0.100 0.6563.500 3.687 4.375 4.390 3.937 2.968 3.906 0.781 0.100 0.6563.625 3.812 4.500 3.093 4.031 0.781 0.100 0.6563.750 3.937 4.625 4.646 4.252 3.093 4.031 0.781 0.100 0.6563.875 4.062 4.750 3.218 4.156 0.781 0.100 0.6564.000 4.187 4.875 4.921 4.567 3.218 4.156 0.781 0.100 0.656

d1 d1 d14 d16 da dbi l1 tl1S l17 l290.375 9.53 11.0 24.60 18.8 12.5 53.0 34.0 7.5 9.00.500 12.70 13.5 27.80 22.3 16.0 53.0 34.0 7.5 9.00.625 15.88 17.0 30.95 26.5 20.0 54.5 35.5 9.0 10.50.750 19.05 20.0 34.15 29.5 23.0 54.5 35.5 9.0 10.50.875 22.23 23.0 37.30 33.0 27.0 54.5 35.5 9.0 10.51 .000 25.40 26.5 40.50 38.0 30.5 54.5 35.5 9.0 10.51 .125 28.58 29.5 47.65 41.5 34.5 72.0 45.0 10.5 12.01 .250 31.75 32.5 50.80 45.0 38.0 72.0 45.0 10.5 12.01 .375 34.93 36.5 54.00 48.0 41.0 72.0 45.0 10.5 12.01 .500 38.10 39.5 57.15 52.5 44.5 72.0 45.0 10.5 12.01 .625 41.28 42.5 60.35 57.0 48.5 72.0 45.0 10.5 12.01 .750 44.45 46.0 63.50 60.5 51.5 83.0 53.0 10.5 12.01 .875 47.63 49.0 66.70 64.0 55.0 83.0 53.0 10.5 12.02.000 50.80 52.0 69.85 66.0 58.0 84.5 54.5 12.0 13.52.125 53.98 55.5 73.05 71.0 61.5 84.5 54.5 12.0 13.52.250 57.15 58.5 76.20 76.5 65.0 84.5 54.5 12.0 13.52.375 60.33 61.5 79.40 78.5 68.5 84.5 54.5 12.0 13.52.500 63.50 65.0 82.55 82.0 72.0 84.5 54.5 12.0 13.52.625 66.68 68.0 92.10 84.0 75.0 86.0 65.0 14.5 16.02.750 69.85 71.0 95.25 89.0 79.0 86.0 65.0 14.5 16.02.875 73.03 74.5 98.45 92.5 82.0 89.0 68.0 14.5 16.03.000 76.20 77.5 101.60 95.5 85.5 89.0 68.0 14.5 16.03.125 79.38 80.5 111.15 101.5 91.0 99.0 76.0 18.5 20.03.250 82.55 84.0 114.30 99.0 76.0 18.5 20.03.375 85.73 87.0 117.50 99.0 76.0 18.5 20.03.500 88.90 90.5 120.65 111.5 100.0 99.0 76.0 18.5 20.03.625 92.08 93.5 123.85 103.0 79.0 18.5 20.03.750 95.25 96.5 127.00 118.0 108.0 103.0 79.0 18.5 20.03.875 98.43 100.0 130.20 106.0 82.0 18.5 20.04.000 101.60 103.0 133.35 125.0 116.0 106.0 82.0 18.5 20.0

MG9 . . . the alternativeBurgmann* Crane* Sealol* Dimensions Table

MG910/d1-G50 1A 43 CE long inch / mm1A 43 CE long mm

MG920/d1-G50 2 43 CE short inch / mm2 43 CE short mm

MG901/d1-G55 1 43 CU long inch (USA only)

MG921/d1-G55 2 43 CU short inch (USA only)21 43 CU short inch (USA only)

MG912/d1-G60 502 43 DIN mm521 43 DIN mm

2100-l1k 43 DIN mm

MG913/d1-G60 2100-l1N mm

* identical fitting dimensions

A

CB

AB

C

MG9

Dimensions in inches / mm Dimensions in inches

AB

CC

AA

A

A


Seal faces SeatsG4, G6 G9 G50 G60 G606

Q1 S V Q1 S V V Q1 BA Q1 U3


MG1

Single sealUnbalancedIndependentof direction of rotationElastomer bellowsMechanical seals of the MG series areamongst the most commonly used. Thebellows is not subjected to any torsionalstress and its ingenious design incorpo-rates several functions, as seal face carri-er, secondary sealing element and drivecollar. The seal face is driven through thespring and L-rings. There are no bondedjoints and all the face materials are inter-changeable without having to modify anydimensions. Highly recommended for du-ties with media containing solids eg. inwaste water and sewage applications.

MG1Item Part No. Description

DIN24250

1.1 472 Seal face1.2 481 Bellows1.3 484.2 "L-ring

(spring collar)1.4 484.1 "L-ring

(spring collar)1.5 477 Spring2 475 Seat3 412 O-ring or cup rubber

G4

Stationary seats

*) Unquoted dimensions as for G9

G6*EN 12756


d1 = 10 ... 100 mmp1 = 12 (16) bar m170 (230) PSI

vacuum up to 0.5 bar (up to 1 barwith seat locking)

t = 20 ... +120 (140) C4 F ... +250 (284) F

vg = 10 m/s m33 ft/s

MG12Dimensions, items and designations same as for MG1, but with an extendedbellows tail to achieve the fitting lengthI1K according to EN 12756 in combinati-on with seat G6 or G60. (d4 min acc. to EN12756 is exceeded).

Materials

Seal faces and seats(see table for combinations): Silicon carbide SiC (Q1) Carbon graphite, antimony-impregnated (A) Tungsten carbide (U3) Special cast chromium-molybdenum steel (S)

Aluminium oxide (V) Carbon graphite, resin-impregnated (B)

Bellows: FPM (V), EPDM (E), NBR (P)Springs, L-rings: 1.4571 (G), Hastelloy C4 possible, please inquire.Designations ( ) according to EN 12756.

G606*EN 12756

G60*EN 12756

G50

h 8

+ 0,5

G9EN 12756


Dimensions in mm.Fitting length tolerances: d1 10 ... 12 mm 0.5; d1 14 ... 18 mm 1.0; d1 20 ... 26 mm 1.5; d1 = 28 ... 100 mm 2.0*) Minimum diameter of the mating collar

Dimensions adaptations for specific conditions, e.g. shaft in inches or special seat dimensions are available on request..

MG

1MG13Dimensions, items and designationssame as for MG 1, but with an extendedbellows tail to achieve the fitting lengthI1N according EN 12756 in combinationwith seat G6 or G60. (d4 min acc. to EN12756 is exceeded).

MG1S20Dimensions, items and designationssame as for MG 1, but with an extendedbellows tail to achieve the special fit-ting length I1S in combination with seatG50.

RMG12 (not illustrated)Identical to MG1, but with a special bel-lows surface on the shaft side. For use inhot-water pumps at up to 120 Cand 25 bar and/or 140 C/16 bar.Only in combination with seat G606. d1 = 12 ... 38 mm

MG1 multiple sealThe MG1 can also be used as a doubleseal in tandem or back-to-back arrange-ment. Installation proposals can be sup-plied on request.

d11012141516181920222425283032333538404243454850535558606568707580859095

100

d3f15.717.719.720.821.023.726.726.727.731.231.235.037.040.240.243.246.248.851.851.853.856.858.862.264.267.270.075.078.080.085.590.596.0

102.0107.0112.0

d6171921

2327

2931333437394242444951

54565962656770727781838895

100105110115

d7212325

2733

3537394043454848505658

616366707375788085909297

105110115120125

333333333333334444444444444444444

d1115.517.520.520.522.024.0

29.529.532.032.036.039.242.244.246.249.252.2

53.355.359.760.863.866.569.571.576.582.783.090.295.2

100.2105.2111.6114.5

d1219.221.624.624.628.030.0

35.035.038.038.042.045.048.050.052.055.058.0

62.064.068.469.372.375.478.480.485.491.592.099.0

104.0109.0114.0120.3123.3

d1411.013.517.017.017.020.020.021.523.026.526.529.532.532.536.536.539.542.546.046.046.049.052.055.558.561.561.568.071.071.077.584.087.093.596.5

103.0

d16f24.6027.8030.9530.9530.9534.1534.1535.7037.3040.5040.5047.6550.8050.8054.0054.0057.15

60.3563.5063.5063.5066.7069.8573.0576.2079.4079.4092.1095.2595.25

101.60114.30117.50123.85127.00133.35

dan22.525.028.528.528.532.037.037.037.042.542.549.049.053.553.557.059.062.065.565.568.070.574.078.581.085.588.593.596.599.5

107.0112.0120.0127.0132.0137.0

db*)20.522.526.526.526.529.033.033.033.038.038.044.044.046.046.050.053.055.058.058.060.063.065.070.072.075.079.084.088.090.095.0

100.0107.0114.0119.0124.0

182022222229333333383837374141445355535355586063656870778082879297

104109114

dm*) ds*)182022222226282828323237374141444749535355586063656870778082879297

104109114

dST24263030303338383844445050555559616467677074778183889196

100103110116124131136140

lm14.515.017.017.017.019.521.521.521.522.523.026.526.527.527.528.530.030.030.030.030.030.530.533.035.037.038.040.040.040.040.040.041.045.046.047.0

l1n25.925.928.428.428.430.030.030.030.032.532.535.035.035.035.035.036.036.036.036.036.036.038.036.536.541.541.541.541.248.748.748.046.051.051.051.0

l1Ki32.532.535.0

35.037.5

37.537.540.040.042.542.542.542.542.545.045.0

45.045.045.047.547.547.552.552.552.552.560.060.060.060.065.065.065.0

l1N404040

4045

4545505050505555555555

6060606070707070808080809090909090

l1Sl34.034.035.535.535.535.535.535.535.535.535.545.045.045.045.045.045.045.053.053.053.053.054.554.554.554.554.565.065.065.068.076.076.079.079.082.0

l2n33.433.433.433.433.437.537.537.537.542.542.542.542.547.547.547.546.046.051.051.051.051.050.559.059.059.059.069.068.768.768.778.076.076.076.076.0

l3252525252525252525252533333333333333414141414141414141494949525656595962

l5i1.51.51.5

1.52.0

2.02.02.02.02.02.02.02.02.02.02.0

2.02.02.02.52.52.52.52.52.52.52.52.53.03.03.03.03.0

l6444455555555556666666666677777777

l7i8.58.58.5

8.59.0

9.09.09.09.09.09.09.09.09.09.09.0

9.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.0

l8n17.517.517.5

17.519.5

19.519.519.519.519.519.519.519.519.522.022.0

22.022.022.023.023.023.023.023.023.026.026.026.026.226.226.225.225.2

l9g10.010.010.0

10.011.5

11.511.511.511.511.511.511.511.511.514.014.0

14.014.014.015.015.015.015.015.015.018.018.018.018.218.218.217.217.2

l107.57.57.5

7.58.5

8.58.58.58.58.58.58.58.58.5

10.010.0

10.010.010.010.512.012.012.012.012.012.512.512.513.015.015.015.015.0

l127.56.56.57.58.59.0

8.58.58.58.5

10.011.511.512.012.011.311.813.213.212.812.812.813.514.514.514.514.214.914.215.216.216.016.017.017.0

l146.65.65.66.67.58.0

7.57.57.57.59.0

10.510.511.011.010.310.812.012.011.611.611.612.313.313.313.313.013.713.014.015.014.814.815.815.8

l151.21.21.21.21.51.5

1.51.51.51.51.51.51.51.51.51.51.52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.0

l163.83.83.83.85.05.0

5.05.05.05.05.05.05.05.05.05.05.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.06.0

l177.57.59.09.09.09.09.09.09.09.09.0

10.510.510.510.510.510.510.510.510.510.510.512.012.012.012.012.014.514.514.514.518.518.518.518.518.5

l286.66.66.6

6.67.5

7.57.57.57.57.57.57.57.57.59.09.0

9.09.09.09.5

11.011.011.011.011.011.311.311.312.014.014.014.014.0

L299.09.0

10.510.510.510.510.510.510.510.510.512.012.012.012.012.012.012.012.012.012.012.013.513.513.513.513.516.016.016.016.020.020.020.020.020.0

Ri1.21.21.21.21.51.5

1.51.51.51.51.51.51.51.51.51.51.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52.52.5

d8


W e l c o m e t o o u r s e a l i n g w o r l dw w w . b u r g m a n n . c o m

Readyon thepump shaft...steady...go!

Burgmann Unitex, theinexpensive way to seal yourpumps by way ofa cartridge. The widespectrum of applicationsit offers in the mediumpressure and stress rangemakes the Unitex the idealway to replace packings forthe price of a shaft sleeve.Fits all standard stuffing boxcompartments. Available exwarehouse.Ask for a detailed brochure.


For plain shafts, rotating spring (bellows)

MF95N

d1 d3 d6 d7 d8 l1k l3 l5 l6 l7 l814 24 21 25 3 35.0 30.5 1.5 4 8.5 15.016 26 23 27 3 35.0 29.5 1.5 4 8.5 15.018 32 27 33 3 37.5 30.5 2.0 5 9.0 15.020 34 29 35 3 37.5 30.5 2.0 5 9.0 15.022 36 31 37 3 37.5 30.5 2.0 5 9.0 15.024 39 33 39 3 40.0 33.0 2.0 5 9.0 15.025 39 34 40 3 40.0 33.0 2.0 5 9.0 15.028 42 37 43 3 42.5 35.5 2.0 5 9.0 15.030 44 39 45 3 42.5 35.5 2.0 5 9.0 15.032 46 42 48 3 42.5 35.5 2.0 5 9.0 15.033 47 42 48 3 42.5 35.5 2.0 5 9.0 15.035 49 44 50 3 42.5 35.5 2.0 5 9.0 15.038 54 49 56 4 45.0 37.0 2.0 6 9.0 16.040 56 51 58 4 45.0 37.0 2.0 6 9.0 16.043 59 54 61 4 45.0 37.0 2.0 6 9.0 16.045 61 56 63 4 45.0 37.0 2.0 6 9.0 16.0

d1 d3 d6 d7 d8 l1k l3 l5 l6 l7 l848 64 59 66 4 45.0 37.0 2.0 6 9.0 16.050 66 62 70 4 47.5 38.0 2.5 6 9.0 17.053 69 65 73 4 47.5 38.0 2.5 6 9.0 17.055 71 67 75 4 47.5 38.0 2.5 6 9.0 17.058 78 70 78 4 52.5 42.0 2.5 6 9.0 18.060 80 72 80 4 52.5 42.0 2.5 6 9.0 18.063 83 75 83 4 52.5 42.0 2.5 6 9.0 18.065 85 77 85 4 52.5 42.0 2.5 6 9.0 18.068 87 81 90 4 52.5 41.5 2.5 7 9.0 18.570 90 83 92 4 60.0 48.5 2.5 7 9.0 19.075 99 88 97 4 60.0 48.5 2.5 7 9.0 19.080 104 95 105 4 60.0 48.5 3.0 7 9.0 19.085 109 100 110 4 60.0 48.5 3.0 7 9.0 19.090 114 105 115 4 65.0 52.0 3.0 7 9.0 20.595 119 110 120 4 65.0 52.0 3.0 7 9.0 20.5

100 124 115 125 4 65.0 52.0 3.0 7 9.0 20.5

Single sealBalancedIndependent of directionof rotationMetal roller bellowsEN 12756*Roller bellows seals in the MF95N serieshave a very wide field of application andare particularly ideal for pumps in thewaste water sector, the chemical industry,refineries and any areas needing to meetsterile requirements such as in the phar-maceutical and food industries. Theseseals are rugged and insensitive to solidsin the medium. The combination of highlyresistant materials and standardizeddimensions offers great potential for stan-dardization projects.

Materials

Bellows: M5 Hastelloy CBellows support: G1Seal faces: Q12, B, ASeat: Q1

MF95NItem Part no. Description

DIN24250

1.1 472/481 Seal face withbellows unit

1.2 412.1 O-ring1.3 904 Threaded pin2 475 Type G16 seat3 412.2 O-ring


d1 = 14 ... 100 mm 0.55 ... 3.94t = 40 ...+220 C 40 F ... 428 F

= (SiC against carbon) == 40 ...+180 C 40 F ... 356 F= (SiC against SiC)

p = 16 bar 232 PSIvg = 20 m/s 66 ft/spermissible axial movement: 0.5 mm

Technical features

MF95N mechanical seals have nodynamic O-ring and are therefore insensi-tive to deposits on the shaft. The flexibi-lity of the bellows does not deteriorate inany way, ensuring that the sealing gapremains closed. The seal face carrier has an amplitudelimiter to guarantee trouble-free andsmooth running (important when there isany risk of dry running). A favourable bellows geometry pre-vents the cavities becoming clogged bymedia containing solids. An open structu-re and smooth surface enables easy clea-ning if necessary. The bellows has very good spring cha-racteristics. Its longitudinal weld seamhas no negative impact. Axial pressure isevenly distributed by the roller bellows,guaranteeing reliable adaptation of thesliding face even when there are axialdeflections.

MF9

5N


For plain shafts, rotating bellows

MFL85N

Single sealBalancedIndependentof direction of rotationMetal bellowsTo EN 12756Mechanical seals in the MFL series havea universal field of application. They aredesigned for extreme ranges of tempera-ture and for high-viscosity media. There isno dynamic O-ring and therefore a bel-lows seal will never hang-up. (See page63 for details of the MFL65 stationarybellows seal.)

Operating limits

d1 = 16 ... 100 mm 0.64" ... 4"p1 = with external pressurization1)

25 bar 360 PSIwith internal pressurization2)


MFL

85N

MFLWT80/ MFLCT80Dimensions are not to EN 12756. Sealface positively driven to protect bellowsfrom torsional stress. Secondary sealsmade of Burgmann Statotherm.

Item Part no. Descriptionto DIN24250

1.1 472/481 Seal face withbellows unit

1.2 410 Sealing ring1.3 474 Drive collar1.4 Socket head screw1.5 904 Set screw2 475 Stationary seat3 412 Sealing ring

d1161820222425283032333538404345485053555860636568707580859095

100

d3g30.032.033.536.539.039.642.845.046.048.049.252.355.557.558.761.965.068.270.071.774.679.084.187.387.395.098.4

104.7111.0114.0117.4

MFL85N/MFL85Fd6232729313334373942424449515456596265677072757781838895

100105110115

d72733353739404345484850565861636670737578808385909297

105110115120125

d83333333333344444444444444444444

deg25.028.029.532.034.535.538.540.542.043.045.548.050.053.055.058.060.564.065.567.069.572.578.082.081.087.091.096.0

103.0106.0111.0

ds38394144474851535556586164676972747780838588959696

104109114119124129

l1Kf42.51)

37.537.537.540.040.042.542.542.542.542.545.045.045.045.045.047.547.547.552.552.552.552.552.560.060.060.060.065.065.065.0

l3n32.530.530.530.528.528.531.031.031.031.031.031.031.031.031.031.032.532.532.537.537.537.537.534.542.042.041.841.846.847.847.8

l5f1.52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.52.52.52.52.52.52.52.52.52.53.03.03.03.03.0

l64555555555566666666666677777777

l8n17.514.014.014.019.519.519.519.519.519.519.522.022.022.022.022.023.023.023.023.023.023.023.026.026.026.026.226.226.225.225.2

l9g10.011.511.511.511.511.511.511.511.511.511.514.014.014.014.014.015.015.015.015.015.015.015.018.018.018.018.218.218.217.217.2

l18f

15.015.015.015.015.015.015.015.015.015.016.016.016.016.016.017.017.017.018.018.018.018.018.519.019.019.019.020.520.520.5

l19

7.07.07.07.07.07.07.07.07.07.08.08.08.08.08.09.59.59.5

10.510.510.510.511.011.511.511.511.513.013.013.0

bf1.61.61.61.61.61.61.61.61.61.61.61.61.61.61.61.61.61.61.63.03.03.03.01.63.03.03.03.03.03.03.0

sn9.0

10.010.010.08.28.59.08.59.29.29.59.29.29.29.59.2

10.510.510.014.014.014.014.010.017.016.016.016.021.021.020.0

MFLWT80/MFLCT80d338404244464750525455576066697174767981858790929597

102107112117122127

d629.031.034.037.037.039.042.044.049.049.051.054.056.059.062.065.067.070.072.075.077.081.083.088.088.095.0

100.0105.0110.0115.0122.2

d7f35.037.040.043.043.045.048.050.056.056.058.061.063.066.070.073.075.078.080.083.085.090.092.097.097.0

105.0110.0115.0120.0125.0134.3

3333333344444444444444444444445

d8 l1f58.058.058.058.058.058.058.058.060.560.560.560.561.561.562.562.562.562.562.568.068.071.071.071.071.071.071.071.071.071.074.0

l346.546.546.546.546.546.546.546.546.546.546.546.547.547.547.547.547.547.547.553.053.053.053.053.053.052.852.852.853.853.854.0

l52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.52.52.52.52.52.52.52.52.52.52.53.03.03.03.03.03.0

5555555566666666666667777777779

l6999999999999999999999999999999

11

l7 l8i19.519.519.519.519.519.519.519.522.022.022.022.022.022.023.023.023.023.023.023.023.026.026.026.026.026.226.226.225.225.230.0

l9i11.511.511.511.511.511.511.511.514.014.014.014.014.014.015.015.015.015.015.015.015.018.018.018.018.018.218.218.217.217.220.0

f5555555555555555555566666666666

k5555555555556666666666666666666

mxM5M5M5M5M5M5M6M6M6M6M6M6M6M6M6M6M6M6M6M6M8M8M8M8M8M8M8M8M8M8M8

1) Installation length is longer than l1K specified by EN 127562) d3' Executed in Hastelloy

49.851.754.556.659.559.562.565.765.768.671.575.176.180.880.884.092.395.595.5

101.3101.3105.0110.6117.0120.2125.2130.2

d3'2)


For plain shafts, rotating spring

HJ92N

Single sealBalancedIndependenton direction of rotationSpring, product protectedTo EN 12756Mechanical seals of the HJ series aredesigned for media containing solids orwith high viscosity e.g. sugar, paper,sewage and waste water industry. Thesprings are product protected. There is no sticking or clogging making the de-sign rugged and reliable.

HJ92NItem Part no. Description

to DIN24250

1.1 472/473 Seal face(carbon graphite)shrink-fitted into theseal face housing

1.2 485 Drive collar1.3 412.2 O-ring1.4 412.1 O-ring1.5 477 Spring1.6 904 Set screw2 475 Stationary seat

(type G16)3 412.3 O-ring


d1 = 18 ... 100 mm m0.625" ... 4"p1*)= 0.8 ... 25 bar m11 ... 360 PSI

HJ 92 N:t = 50 ... +220 C

= 58 F ... +430 Fvg = 20 m/s m66 ft/s

HJ 977 GN:t = 20 ... +180 C

= 4 F ... +356 Fvg = 10 m/s m33 ft/s

*) An integral stationary seat lock is notneeded within the permissible low pres-sure range. For prolonged operation un-der vacuum it is necessary to arrange for quenching on the atmospheric side.Axial movement 0.5 mm.

Combination of materials andseal types

Stationary seats

G16 G46

V; Q1 Q12

HJ92 (A; B1) HJ92N HJ927GN2)

HJ97G (Q12) HJ97GN51) HJ977GN

1) Installation length l12 is shorter than l1K2) Installation length l11 is longer than l1KAll material designations to EN 12756.See inside the back cover of this manual.

Rotatingunit(seal facematerial)

HJ977GNItem nos and descriptions as for HJ92N,but with the seal face (Item No. 1.1) andthe stationary seat (Item No. 2) made of silicon carbide and shrink-fitted. The stationary seat is type G46.Unquoted dimensions as for HJ 92 N.


HJ92

NSpecial design (example)SHJ97GFor use in sterile processes. With smooth surfaces (electropolishing onrequest) specially designed O-ring groo-ves for special elastomeric seal-rings and O-rings bearing no gaps, plus manyother features. Also available as SHJ92design. Please enquire for details.

d11820222425283032333538404345485053555860636568707580859095

100

d332343638394244474749545659616466697178808385889099

104109114119124

d62729313334373942424449515456596265677072757781838895

100105110115

d733353739404345484850565861636670737578808385909297

105110115120125

d8333333333344444444444444444444

dmf26.028.030.032.533.536.538.541.541.543.547.549.552.554.557.559.562.564.568.570.573.575.578.580.589.094.099.0

104.0109.0114.0

l1K37.537.537.540.040.042.542.542.542.542.545.045.045.045.045.047.547.547.552.552.552.552.552.560.060.060.060.065.065.065.0

l3n30.530.530.533.033.035.535.535.535.535.537.037.037.037.037.038.038.038.042.042.042.042.041.548.548.548.548.552.052.052.0

l5f2.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.52.52.52.52.52.52.52.52.52.53.03.03.03.03.0

l6555555555566666666666677777777

l7999999999999999999999999999999

l8g15.015.015.015.015.015.015.015.015.015.016.016.016.016.016.017.017.017.018.018.018.018.018.519.019.019.019.020.520.520.5

l207.07.07.07.07.07.07.07.07.07.08.08.08.08.08.09.59.59.5

10.510.510.510.511.011.511.511.511.513.013.013.0

l111)

39.539.539.542.042.045.045.045.045.045.047.547.547.547.547.550.050.050.055.055.055.055.055.062.562.562.562.567.567.567.5

l122)

35.535.535.538.038.040.040.040.040.040.042.542.542.542.542.545.045.045.050.050.050.050.050.057.557.557.557.562.562.562.5

l13f28.528.528.531.031.033.033.033.033.033.034.534.534.534.534.535.535.535.539.539.539.539.539.046.046.046.046.049.549.549.5

l18f17.017.017.017.017.017.517.517.517.517.518.518.518.518.518.519.519.519.520.520.520.520.521.021.521.521.521.523.023.023.0

l199.09.09.09.09.09.59.59.59.59.5

10.510.510.510.510.512.012.012.013.013.013.013.013.514.014.014.014.015.515.515.5

fn3.03.03.03.53.53.53.53.53.53.54.04.04.04.04.04.54.54.54.54.54.54.54.55.05.55.55.55.55.55.5

mxM4M4M4M5M5M5M5M5M5M5M5M5M5M5M5M6M6M6M6M6M6M6M6M6M8M8M8M8M8M8

Special design HJ42Mechanical seal in the HJ series withproduct-protected multiple springs, forapplications involving operating pressu-res of up to 50 bar.Please contact us for details of dimen-sions.


For stepped shafts, rotating spring

H12N

Single sealBalancedConical springDependenton direction of rotationTo EN 12756Mechanical seals of the H12N series are a cost effective version of a balan-ced seal. They feature the same ruggedand reliable construction as the unba-lanced spring seals (see M3 pages 28and 29) in the Burgmann range. Theseseals are primarily used in the chemicalsector and in water pumps.

H12NItem Part no. Description

to DIN24250

1.1 472/473 Seal face (carbon graphite)shrink-fitted into theseal face housing

1.2 412.1 O-ring1.3 474 Thrust ring1.4 478 Righthand spring1.4 479 Lefthand spring2 475 Type G9 stationary seat3 412.2 O-ring


d1 = 10 ... 80 mm m0.4" ... 3.125"p1 = 25 bar m360 PSI

H12N:t = 80 ... +220 C

= 175 F ... +430 F

H17GN:t = 20 ... +180 C

= 4 F ... +356 Fvg = 15 m/s m50 ft/sAxial movement 1.0 mm

H17GNDimensions, item nos and descriptionsas for H 12 N, but with the seal face(carbide) shrink-fitted into the seal facehousing (Item no. 1.1).

Stationary seat alternative

G115

The H 12 N is delivered with a type G9 stationary seat. Especially for hot waterapplications the type G115 for seat cooling is available. In this case, thedimensions of the H12N rotating unit are modified. Please ask about seal designation H127G115.

G 115

G9 stationary seats

S V Q1 A B(Q2)

H12N (A)

H17GN (Q12)

Rotating unit

Combination of materialsand seal types


H12

N

id11012141618202224252830323335384043454850535558606365681)707580

d21416182022242628303335383840434548505355586063656870

758085

d32426313436384042444749545456596164666971787983858890

98103109

d61719212327293133343739424244495154565962656770727577

838895

d72123252733353739404345484850565861636670737578808385

9297

105

d833333333333333444444444444

444

db1821232628303135374043454549525558616466697174778083

889398

l1N5050555555606060606565656565757575758585858585959595

95105105

l1g35.536.539.541.044.044.044.044.045.047.047.051.051.055.060.062.065.069.069.073.075.075.075.075.075.076.0

81.086.086.0

l21818181820202020202020202020232323232325252525252525

282828

l3g25.526.529.531.032.532.532.532.533.535.535.539.539.543.546.048.051.055.055.058.060.060.060.060.060.061.0

63.068.068.0

l51.51.51.51.52.02.02.02.02.02.02.02.02.02.02.02.02.02.02.02.52.52.52.52.52.52.5

2.52.53.0

l644445555555555666666666666

777

l7f8.58.58.58.59.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.09.0

9.09.09.0

l8g17.517.517.517.519.519.519.519.519.519.519.519.519.519.522.022.022.022.022.023.023.023.023.023.023.023.0

26.026.026.2

l9g10.010.010.010.011.511.511.511.511.511.511.511.511.511.514.014.014.014.014.015.015.015.015.015.015.015.0

18.018.018.2

b2)

8.08.08.08.08.08.08.08.08.08.08.07.57.58.07.58.08.0(8)8.08.08.08.08.08.08.0

10.0

10.010.010.0

1) No provision for balanced type to DIN2) Figure in brackets means installation length is longer than L1N specified by EN 12756.


4)3)


For stepped shafts, rotating spring

H7NStationary seat alternative

G115

mmmmmmStationary seats

G9 G115

A, B mQ2 mQ1 Q12

A*)

Q1

Q2

V

S

*) only in the shrink-fitted version forH75N, H76N, H75G16

Single sealBalancedIndependentof direction of rotationTo EN 12756*The H7N mechanical seal range is de-signed for universal application and theinterchangeable parts concept is ideal forstock rationalisation. The seal faces areloosley inserted and can be easily ex-changed, the thrust ring is retained by thedrive lugs preventing the springs fallingout. New: H7N with Super-Sinus spring(see page 139).


d1 = 14 ... 200 mm m0.55 ... 8p1 = 25 (40) bar*) m360 (580) PSIt = 50 ... 220 C m58 F ... 430 Fvg = 20 m/s m66 ft/s

*) With a shrink-fitted carbon graphiteseal face (A), a stationary seat in Q1, se-condary seals made of V, P (90 Shore) orE (80 Shore), and a prod

Documents

SELLOS BURGMANN