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AVK WEDGE GATE VALVE, PN10/16 21/50

The Series 21/50 is a resilient seat, wedge gate valve suitable for use with water and neutral liquids(sewage), to a maximum temperature of +70C.

Features:

Cap top as standard.

Ductile iron wedge, fully vulcanised withEPDM rubber.

O-ring stem seals replaceable underpressure.

Fully corrosion resistant construction.

Fusion bonded epoxy coating.

Body/bonnet and gland bolts sealed withhot melt.

WRAS approved.

Options:

Handwheel.

Alternative flange drilling.

ISO gland flanged version for gearbox andactuator mounting (21/01).

Clockwise to open (red insert), clockwise toclose (white insert).

The designs, materials and specifications shown are subject to change without notice due to our continuing programme ofproduct development.

AVK UK Limited 21/50:V1:1710

Note:It is recommended that applications in a corrosive atmosphere or sited in exposed locations use astainless steel stem 1.4404 (316) and all exposed fasteners including the handwheel bolt andwasher in A4 stainless steel. The problem of early indications of surface corrosion is caused bycorrosive atmosphere and exposure to rainwater and the proximity of sea water or spray.

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AVK WEDGE GATE VALVE, PN10/16 21/50

TESTS

Hydraulic test to BS EN 1074-1 & 2.Seat: 1.1 x PN (PFA) Body: 1.5 x PN (PFA). Operatingtorque test.

APPLICABLE STANDARDS

To BS 5163: part 1 & 2 type B. BS EN 1074-1 & 2. Stemsealing replaceable under pressure.Overall length to BS 5163: Pt 1 (BS EN 558-1).Flanges and drilling to BS EN 1092-2. WRAS listed.

SERVICE CONDITIONS

Maximum Working Pressure: 16 Bar. (1.6 mpa).Temperature Range: -10C to +70C.

Insulation essential fortemperatures of 0C and

below.Maximum Dry Solid Content: 10%

MATERIALS OF CONSTRUCTION

No. DESCRIPTION MATERIAL1 Stem Cap Grey iron, BS EN 1561

EN-GJL-250 completewith cap screw FZP GR 8.8to ISO 4762.

2 Stem Stainless steel, BS EN10088-1.No.1.4021.

3 Gland Flange Ductile iron, BS EN 1563Assembly EN-GJS-500-7 complete

with polyamid bushingcontaining 1 wiper ring + 3O rings of EPDM and 2bolts FZP Gr 8.8 to ISO4762.

4 Thrust Collar DZR brass, BS EN 12164,CW602N.

5 Bonnet Ductile iron, BS EN1563 EN-GJS-500-7.

6 Bonnet Bolts FZP Gr 8.8 to ISO4762 sealed with hot melt.

7 Body, Bonnet Seal EPDM rubber, ESW-70,WRAS listed.

8 Body Ductile iron, BS EN1563 EN-GJS-500-7.

9 Wedge Assembly Ductile iron, BS EN 1563 EN-GJS-500-7.

Fully encapsulated withESW-70 rubber WRASlisted, complete with wedgenut of DZR brass BS EN12164, CW 602N.

Coating Internal and external,electrostatically applied.Blue epoxy to WIS 4-52-01Class B. WRAS listed.

f

Northampton Office8 Rushmills, Northampton,NN4 7YB England, UK.Tel.: +44 (0) 1604 601188Fax.: +44 (0) 1604 604818AVK UK Limited

Chesterfield OfficeColliery Close, Ireland Ind. Est., Staveley,Chesterfield, S43 3FH England, UK.Tel.: +44 (0) 1246 479100Fax.: +44 (0) 1246 479200 www.avkuk.co.uk

DIMENSIONS & WEIGHTS

Ref No. DN L H Dt D f Wt

mm mm mm mm mm Kg

PN10 PN16 PN10 PN16 PN10 PN16

21-050-50X1 50 178 326 102 165 19 14.2

21-080-50X1 80 203 339 138 200 19 17

21-100-50X1 100 229 371 158 220 19 22.5

21-150-50X1 150 267 503 212 285 24 41

21-200-50X1 200 292 592 268 340 295 295 22 22 8 12 27 55.8

21-250-50X1 250 330 680 320 405 350 355 22 26 12 12 27 84.9

21-300-50X1 300 356 758 370 460 400 410 22 26 12 12 27 123.1

X=2 for clockwise to close, 3 for clockwise to open.

Holes

no.

125 18 4

mm

Dh ds

no.

8

8

8

160

180

240

18

18

22

H

f

DtDhD

dsL

1

2

3

4

5

6

7

8

9

144