P r z e p ł y w o m i e r z e t u r b i n o w e W e b t e c t y p C T - R - S R

P O M I A R P R Z E P Ł Y W U C I E C Z Y

CTR-BU-ENG-2425.pdf 11/13(Issue 7)

CTR SeriesTurbine flow meters with conditioned output and built-in loading valve

Milwaukee, WI 53235, USATel: +1 (414) 769-6400sales-us@webtec.com

St. Ives, Cambs. PE27 3LZ, UKTel: +44 (0) 1480 397 400sales-uk@webtec.com

www.webtec.com

Certificate No.8242

Hydraulic measurement and control

Up to l 800 lpm, 210 US gpml 480 bar, 7000 psi

Output Optionsl 4 - 20 mA, 0 - 5 V

Featuresl FLOW: 8 - 800 lpm, 2 - 210 US gpm

l PRESSURE: Up to 480 bar, 7000 psi

l OUTPUT OPTIONS: 4 - 20 mA or 0 - 5 V

l LOADING VALVE: with bi-directionalflowand

pressure loading capability *

l ‘INTERPASS™’ safety disc system, bypasses oil internally in the event of the valve being over pressurised

l FLUIDS: Wide range of hydraulic oil, lubrication oils, and fuels

l CALIBRATION: 21 cSt as standard. Special calibration possible

l COMPREHENSIVE range of accessories available including pressure transducers, temperature sensors panel meters and cables. See bulletinss MPT, TP125 and DP130 for details orconsultsalesoffice

TheCTRseries of turbine flowmeterswithbuilt-in loading valve, provideacompletesolutiontotheflowmeasurementofhydraulicsystemsonteststands,machinetoolsandotherfixedormobileapplications.Theflowmetercan be installed anywhere in the hydraulic circuit for production testing, commissioning, development testing and control systems. The compact design allows the CTR series flowmeters to be installedwhere space islimited.

The integral loading valve provides smooth progressive pressure control in bothflowdirectionsallowingcomponentssuchascylindersormotorstobetested without re-plumbing the test connections.

The CTR turbine flowmeter has a built-in micro-processor that conditionsthesignal fromtheflowmeter toprovideanaccurateanalogueoutput.Thisenablesyoutoconnecttheflowmeterdirectly intoyourdigitaldisplay,PLCor custom DAQ system. Two versions are available offering 4 - 20mA currentloop or 0 - 5 V.

* Greater flow accuracy is obtained in the forward direction.

CTR mA model shown

Specifications

Functional specificationAmbient temperature: 5 to 40 °C (41 - 104 °F)Fluid type: Oils, fuels, water glycol, water oil emulsionsFluid temperature: 5 to 90 °C (41 - 194 °F) continuous use.Accuracy: 15 to 100% of range - 1% of indicated reading Below15%fixedaccuracyof1%of15%offullscaleRepeatability: Better than ± 0.2%Response Time: 50 m/s + 1 periodDegree of protection*: CTR-mA, CTR-5V– IP66 (EN60529) *With cable connected

Electrical specificationSupply voltage (VS): mA & 5V = 12 - 32 VDCCurrent output: 4 - 20 mA, 3wireloop,maxloopresistance=(VSx50)-200ohmsVoltage output: 0 - 5 VDC, current consumption=10mA, minimum load 20K ohms

Construction materialFlow body: High tensile Aluminium 2014A T6Internal parts: Aluminium, Steel, Stainless Steel.Transducer: Bodyandnut-steel212A42electrolessnickelplated,Lidandhousing-Aluminium2011T3Seals: VitonsealsasstandardEPDMareavailable-pleaseconsultsalesoffice.

CT600R,800Rhaslimitedpressurecontrolbelow86lpm(23USgpm).Themaximumcontrollablepressureinthisregioniscalculatedby:maxpressure(inbar)=5xflow(lpm)+30

Model Number Outputs available Main ports Top ports Flow range Max. pressure CT300R-**-B-B-6 5V, mA 1” BSPP 1/4” BSPP 8 - 300 lpm 420 bar CT300R-**-S-S-6 5V, mA 1-5/16” -12UN #16 SAE ORB 7/16” -20UN #4 SAE ORB 2 - 80 US gpm 6000 psi CT400R-**-B-B-6 5V, mA 1” BSPP 1/4” BSPP 10 - 400 lpm 420 bar CT400R-**-S-S-6 5V, mA 1-5/16” -12UN #16 SAE ORB 7/16” -20UN #4 SAE ORB 2.5 - 100 US gpm 6000 psiCT600R-**-F-B-3 5V,mA 1-1/2”#24SAECode614-boltflange 1/4”BSPP 20-600lpm 210barCT600R-**-F-S-3 5V,mA 1-1/2”#24SAECode614-boltflange 7/16”-20UN#4SAEORB 5-160USgpm 3000psi CT600R-**-S-B-7 5V, mA 1-7/8” -12UN #24 SAE ORB 1/4” BSPP 20 - 600 lpm 480 bar CT600R-**-S-S-7 5V, mA 1-7/8” -12UN #24 SAE ORB 7/16” -20UN #4 SAE ORB 5 - 160 US gpm 7000 psiCT800R-**-F-B-3 5V,mA 1-1/2”#24SAECode614-boltflange 1/4”BSPP 20-800lpm 210bar CT800R-**-S-B-7 5V, mA 1-7/8” -12UN #24 SAE ORB 1/4” BSPP 20 - 800 lpm 480 barCT800R-**-F-S-3 5V,mA 1-1/2”#24SAECode614-boltflange 7/16”-20UN#4SAEORB 5-210USgpm 3000psi CT800R-**-S-S-7 5V, mA 1-7/8” -12UN #24 SAE ORB 7/16” -20UN #4 SAE ORB 5 - 210 US gpm 7000 psi

OperationThere are two key elements - the turbine and the loading valve.Asfluidispassedthroughtheflowblockitrotatesa precision turbine. The flow straighteners and turbinedesignminimisetheeffectsof turbulenceandswirl.Theturbine blades are detected by the magnetic reluctance transducer which produces a pulse output. The flowmeter block has ports for pressure or temperature sensors which can be supplied as an option.The loading valve unique design has a pressure-balanced poppet that ensures low handle effort throughout theflowandpressure ranges inaddition toexcellent tactilefeedback, regardlessof flowdirection. Tuning the valveclockwise increases the restriction and hence the load on the circuit. In the event of overpressure, replaceable safety discs (situated within the poppet) rupture, to internally by-pass the oil at low pressure. Safety discs withdifferentpressurerangesupto480barareavailable-pleaseconsultsalesoffice.

Reverse flowThe flow block is capable of controlling andmeasuringflow in either direction. There is a shuttle valve whichensures the pressure port measure the high pressure side of the loading valve. In order to achieve the quoted accaurcyfiguresflowmustbeinthepreferreddirection-turbinefirstthenloadingvalue.

CalibrationAll units are calibrated with 21 cSt oil as standard. Calibrationcertificatesareavailableonrequest-thisisachargeable option. Other calibration on request - please consultthesalesoffice.

InstallationThe flow blocks have built-in flow straighteners so thenormal recommended length of 10Ø of straight tube can be reduced to 8 Ø where space is limited. 90-degree bends are permitted on the loading valve end of the block, but should always be of a similar bore size to that oftheflowmetertopreventventuriorconstrictioneffects.The range of flowmeters can be used for intermittentorcontinuoustestingofflowineitherdirection.Theflowblock can be mounted in any orientation.

FiltrationItisrecommendedthata25-micronfilterisinstalledinthecircuitpriortotheflowblock.

Top ports All flow meters have two additional ports (see tablefor configuration) in the top face to enable the user toconnect both a temperature and pressure senor. All flowmeterscomewithoneM16x2 testpointfittedasstandard.

OrderingTo order a flowmeter please quote themodel numberfrom the table above. eg: CT300R-MA-B-B-6. All flowmeters can have both a temperature sensor and pressure transducer connected simultaneously.

Pressure Drop ChartHydraulic Oil Viscosity 21 Centistokes (fully open load valve)

Note1 UK gallon = 4.546 litres1 US gallon = 3.785 litres

10.0

5.0

1.0

0.55 10 50 100 500 1000

Pres

sure

Dro

p (b

ar)

Flow (lpm)

CT300R/CT400R

CT600R/CT800R

A

GD

E

CF

B

M10 Port

All models

Pressure/Temp connections

CT300R, CT400R position only

CT600R, CT800R position only

Add 20mm (3/4”) to G for full height including feet.

Model No A B C D E F G Weight kg (lbs) CT300R 49 (2”) 100 (4”) 182 (7-1/8”) 222 (8-3/4”) 102.5 (4”) 47.6 (1-7/8”) 138 (5-1/2”) 3.7 (8.1) CT400R 49 (2”) 100 (4”) 182 (7-1/8”) 222 (8-3/4”) 102.5 (4”) 47.6 (1-7/8”) 138 (5-1/2”) 3.7 (8.1) CT600R 75 (3”) 125 (5”) 211 (8-3/8”) 235 (9-3/4”) 99 (3-7/8”) 63 (2-1/2”) 157 (6-1/8”) 7.5 (16.5) CT800R 75 (3”) 125 (5”) 211 (8-3/8”) 235 (9-3/4”) 99 (3-7/8”) 63 (2-1/2”) 157 (6-1/8”) 7.5 (16.5)

OneM16x2testpointfittedasstandard(Not shown)

Connection Details4 - 20 mA

Pins 1 = +In 2 = N/C 3 = 4 - 20mA out 4 = N/C 5 = GND

1 2

4 3

5V

1 2

4 3

Pins 1 = +In 2 = N/C 3 = 0 - 5V out 4 = N/C 5 = GND

NB. N/C - Do not connect

Connecting cable (5m) FT10228-05Extension cable (5m) FT10229-05Connector(M12x15pin) FT9880

55

Dimensions in mm (inches)

Webtecreservetherighttomakeimprovementsandchangestothespecificationwithoutnotice

APPROVED

AccuracyThe accuracy is better described as the uncertainty of the flowreadingcomparedtoaknownreference.Everyflowmeasurement has an error associated with it, caused by thecombinationofalargenumberoffactorsthataffectthe operation of the flowmeter, these include bearingfriction, temperature, viscosity, magnetic drag and the signal strength to name but a few.

Allourflowmetersarecalibratedat10pointsover theflowrangeanditsperformancemeasuredagainstaflowreference that is traceable to International standards. Accuracy is typically quoted in one of two ways: as a percentageoffullscale(themaximumcalibratedflow)orasapercentageoftheindicatedreading(theactualflow).

Full scale (FS) or full scale deflection (FSD)A term that was originally used for analogue displays where a needle pointed to a number on a scale, hence FSD.Theflowaccuracyisafixedamountregardlessoftheactualflowyouaremeasuring.Forexample1%FSforaflowmeterwithamaximumcalibratedflowof400lpm is ± 4 lpm whether you are measuring 40 lpm, 200 lpm or 400 lpm (see graph below). If you need to measure flowsof40and400lpmwithsameflowmeterthenitisimportanttochecktheallowableerroratallflows.

Indicated reading (IR)Accuracy is quoted as a percentage of the actual value measured.Soiftheaccuracyofa400lpmflowmeteris1% IR then the error at 400 lpm is ± 4 lpm. As the actual flowmeasuredreduces,sodoestheerrorinlpm.Whenmeasuringaflowof60lpmwithanaccuracyof1%IR,the possible error is ± 0.6 lpm. At very low flows, thepossibleerrorsarenolongerproportionaltotheflowrate,butactuallyafixedamountinlpm(seegraphbelow).Forexample if the accuracy is quoted as 1% IR (>60 lpm)for a flowmeterwith the range10 -400 lpm, then theaccuracyis1%oftheactualflowintherange60to400lpmandafixedflowerrorintherange10to<60lpm.

RepeatabilityThe repeatability is the variation in the performance of the flowmeter when used under the same conditions. Ourrangeofflowmetershasexcellentrepeatabilityofbetterthan ± 0.2%. This is just as important as the accuracy since in many applications the flow readings from thesameflowmeterwillbecomparedatregularintervalstolook for any change in performance of the system.

Flow range (Turndown ratio)A turbine flow meter has a minimum and a maximumcalibrated flow which together describe the range offlows that can be accurately measured. Through theadditionofsignalconditioningeithermountedontheflowmeterorbuiltintothereadout,theflowrangeofourflowmeters has been extended considerably compared toothermodelsonthemarket;theratioofthemaximumtotheminimumcalibratedflow(turndownratio)isbetween15and40acrossallmodels.Particularefforthasbeenmade to extend the flow range by calibrating down tolower flows enablingone flowmeter to be usedwheretwo may have been required in the past. This makes the flowmeterbothamoreeconomicalandeasiertoinstallsolution.

Fluid viscosityTheperformanceofaturbineflowmetercanbeaffectedby theviscosityof thefluidmeasured.Our turbineflowmeters are calibrated at between 18 and 26 cSt as standard (a mean viscosity of 21 cSt), which is the typical kinematic viscosity forahydraulicfluidoperatingat50°C.Thekinematicviscosityofallhydraulicfluidsisrelatedto thefluid temperatureandthetablebelowshowstheaffect of temperature on the kinematic viscosity of arange of typical grades of hydraulic oil.

The shaded area of the table shows the range of viscosities that can bemeasured by a flowmeterwithstandardcalibrationwithminimaleffectontheaccuracy(less that ± 1% FS).

Flow meters can be specially calibrated at a differentviscosity to the standard or we can advise on the expected error when the flow meter is used at otherviscosities, please contact sales for further information.

Table showing kinematic viscosity (cSt) of different mineral oils at specific temperatures

ISO15,22,32,46and68basedontypicalfiguresfortheEssoNuto range of HM oils. ISO 37 based on Shell Tellus HM oil.

Flow (lpm)

Erro

r (lp

m)

5

4

3

2

1

0

-1

-2

-3

-4

-5

20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400

Graph showing accuracy of 1% of Full Scale (FS) for a flow meter rated up to 400 lpm

Flow (lpm)

Erro

r (lp

m)

5

4

3

2

1

0

-1

-2

-3

-4

-5

20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400

Graph showing accuracy of 1% of Indicated Reading (IR) for a flow meter rated up to 400 lpm

Turbine Flow Meters

Fluid type Temp °C ISO15 ISO22 ISO32 ISO37 ISO46 ISO68

0 85.9 165.6 309.3 449.9 527.6 894.3 10 49.0 87.0 150.8 204.7 244.9 393.3 20 30.4 50.5 82.2 105.5 127.9 196.1 30 20.1 31.6 48.8 59.8 73.1 107.7 40 14.0 21.0 31.0 36.6 44.9 63.9 50 10.2 14.7 20.8 23.9 29.4 40.5 60 7.7 10.7 14.7 16.5 20.2 27.2 70 6.0 8.1 10.9 12.0 14.6 19.2 80 4.8 6.4 8.4 9.1 11.1 14.3 90 4.0 5.2 6.6 7.2 8.7 11.1 100 3.3 4.3 5.5 6.0 7.1 8.9

O D D Z I A Ł G D A Ń S Kt e l . / + 4 8 / 5 5 6 2 5 5 1 2 1

f a x / + 4 8 / 5 5 6 2 5 5 1 2 2

O D D Z I A Ł R U M I At e l . / + 4 8 / 5 8 6 7 9 3 4 1 5

f a x / + 4 8 / 5 5 6 2 5 5 1 2 5

O D D Z I A Ł T YC H Yt e l . / + 4 8 / 3 2 7 8 7 5 2 8 8

f a x / + 4 8 / 5 5 6 2 5 5 1 3 8

O D D Z I A Ł O L S Z T Y Nt e l . / + 4 8 / 8 9 5 3 2 0 1 0 5

f a x / + 4 8 / 8 9 7 1 5 2 1 4 2

O D D Z I A Ł WA R S Z AWAt e l . / + 4 8 / 2 2 4 6 8 8 6 9 7

f a x / + 4 8 / 5 5 6 2 5 5 1 3 2

B I U R O W E W R O C Ł AW I Ut e l . / + 4 8 / 7 8 2 8 3 8 0 0 0

f a x / + 4 8 / 5 5 6 2 5 5 1 3 5

B I U R O W K I E LC A C Ht e l . / + 4 8 / 8 8 5 9 9 5 5 0 1

f a x / + 4 8 / 5 5 6 2 5 5 1 0 1

B I U R O W K R A K O W I Et e l . / + 4 8 / 8 8 5 9 9 5 0 1 9

f a x / + 4 8 / 5 5 6 2 5 5 1 0 1

B I U R O W O P O L Ut e l . / + 4 8 / 8 8 5 9 9 5 0 1 1

f a x / + 4 8 / 5 5 6 2 5 5 1 0 1

B I U R O W B Y D G O S Z C Z Yt e l . / + 4 8 / 7 9 0 2 2 2 7 7 1

f a x / + 4 8 / 5 5 6 2 5 5 1 0 1

B I U R O W B I A ŁY M S T O K Ut e l . / + 4 8 / 8 9 5 3 2 0 1 0 5

f a x / + 4 8 / 8 9 7 1 5 2 1 4 2

B I U R O W ŁO D Z It e l . / + 4 8 / 6 0 9 2 2 1 4 2 1

f a x / + 4 8 / 8 9 7 1 5 2 1 4 2

C E N T R A L A E L B L Ą G

u l . R a w s k a 1 9 B8 2 - 3 0 0 E l b l ą g

t e l . / + 4 8 / 5 5 6 2 5 5 1 0 0

f a x / + 4 8 / 5 5 6 2 5 5 1 0 1

D z i a ł H a n d l o w y

t e l . / + 4 8 / 5 5 6 2 5 5 1 5 1

e l b l a g @ h y d r o p r e s s . p l

w w w . h y d r o p r e s s . p l