Gear Type Flow Meter VC - Process Pump Sales

1 gear Type Flow MeterVCConstruction and principle of operation1 Housing2 Cover3 Gear4 Preamplifier5 Connector6 Sensor7 Bearing assembly The measuring gears aredriven by the liquid flowon the principle of a gearmotor. The gears run withoutcontact in the measuringchamber. The bearing ele-ments are low-friction ballor plain bearings. The movement of thegears is sampled withoutcontact by means of twosensors located in thecover. Between sensorcompartment and measu-ring chamber is located apressure-resistant, non-magnetic separator plate. 1234675 Principle of operationConstruction When the measuringmechanism rotates by onetooth pitch, the sensoremits a signal which cor-responds to the geometri-cal tooth volume Vgz.

2 The signal is convertedinto a square-wave signalby the preamplifier. The two-channel samplingpermits better resolutionas well as recognition ofthe flow GmbH Postbox 1420/1440 D-58774 Werdohl Phone 0049 (23 92 ) 935-0 Fax 0049 (23 92 ) 935 209 Internet: e-mail: GmbH Postbox 1420/1440 D-58774 Werdohl Phone 0049 (23 92 ) 935-0 Fax 0049 (23 92 ) 935 209 Internet: e-mail: features Optimized for individualapplications because theseries have been renderedmedia-specific by meansof differing clearances,bearing variants andmaterials. Wide measuring rangeswith sizes graduated tomeet specific require-ments. Temperature-independent output signals over a widetemperature range High degree of accuracy,even with low flow ratesat the bottom end of themeasuring range High operating reliability ofthe electronics Easy to use terminal of thepreamplifier Operating indication of theelectronic Sensor system and pream-plifier in EMC compatibledesign Explosion-proof versionavailable for all volumecounters Measurement independentof viscosity within thespecified ranges.

3 Low pressure drop High-response measure-ment High operating pressure Low noise emission High-precision measure-ment with outstandingreproducibilityTypical applicationsApplicationMediumVersionSeri esFlow rate measurementoil, brake fluid, skydrol, dieselcast iron(hydraulic test stand)lubricatingball bearingslow viscosityminimal clearances1 Oil meteringgear oilcast iron(metering plant)lubricatingball bearingsmedium viscosityincreased clearances2 Consumption measurementoffset inkcast iron(Printing press)lubricatingbronze plain bearingshigh viscositylarge clearances3 Ratio controlpolyol + isocyanate, adhesives, resin, siliconcast iron(2 component plant)low lubricitycarbide plain bearingsmedium viscosityincreased clearances4 Batching controlclear lacquer, cavity waxesstainless steel(lacquering plant)low lubricitycarbide plain bearingsmedium viscosityincreased clearances5 Flow rate measurementsolventstainless steel(lacquering plant)lubricatingball bearingslow viscosityminimal clearances6 For fluids with a low viscosity and poor lubricity a hybrid ball bearing (with ceramic balls)is a available for sizes VC , VC , VC and VC meters with hydrid ball bearing are available in cast iron (series 7) and stainless steel (series 8).

4 KRACHT GmbH Postbox 1420/1440 D-58774 Werdohl Phone 0049 (23 92 ) 935-0 Fax 0049 (23 92 ) 935 209 Internet: e-mail: The accuracy figures quoted by KRACHT refer to the geometric tooth volume Vgz, that is to say the percentagedeviation applies to the current value in each case. The linearity error over the entire measuring range is < % Reproducibility of a measured value is < % Accuracy checking forms part of quality inspection inevery case. On request the result of the test will be documented inthe form of an accuracy characteristic curve; an examplerelating to a series 1 VC 1 is given below. The accuracy values quoted by Kracht are confirmed bythe DKD (German Calibration Service).

5 + %Vgz= %0 10 20 30 40 50 60 70 + %Vgz= %0 10 20 30 40 50 60 70 80 Volume per pulseVolume per pulseflow-rate Ql/minflow-rate Ql/mincm3cm3 KRACHT GmbH Postbox 1420/1440 D-58774 Werdohl Phone 0049 (23 92 ) 935-0 Fax 0049 (23 92 ) 935 209 Internet: e-mail: characteristicsOperating characteristicsNominalgeom. tooth-max. operating pressurePeak pressureSound pressureResolutionsizevolumeStandard-Hig h pressureStandard-High pressurelevelversionversion (/79)versionversion (/79)VgZpmaxpmaxp^p^LAImp / l cm3barbarbarbardB (A) 480 < 6040, 480 < 6025, 480 < 6010, 480 < 604, 480 < 702, 480 < < < data sheet VC 10 General characteristicsSeries selection / Summary of variantsSeries12345678 Material housingcast ironGGG 40cast ironcast ironcast ironstainless steelstainless steelcast ironstainless steel(/79 GGG 60)

6 GGG 40 GGG 40 GGG gearssteelsteelsteelsteelstainless steelstainless steelsteelstainless bearingsball bearingsbronzecarbidecarbidestainless steelhybridhybridplain bearingsplain bearingsplain bearingsball bearingsball bearings ball bearingsConnectionPPPPP/RP/RPP/RMax. perm. foreign particle2030503030202020size in the medium ( m)Accuracy % % 1 % % % % 1 % 1 %(from measuring value)at 20 mm2/sat 50 mm2/sat 100 mm2/sat 100 mm2/sat 100 mm2/sat 20 mm2/sat 20 mm2/sat 20 mm2/sNominal sizeStarting pointMeasuring range [l/min]at [l/min] 2 2* 4 8 16 40 30 160 160 2501 801 1601 1601 250 10see data sheet VC 10*Measuring accuracy 3 %; Linearity %Designgear motorConnection typeplate mounting / pipe connectionMounting PositionoptionalFlow ,000 mm2/s, according to seriesMax.

7 Pressure drop pmax= 16 barSealing materialsTFE/PFKMEPDMFEPA mbient temperature-- 10 C + 80 C-- 15 C + 80 C-- 30 C + 80 C-- 30 C + 80 CMedium temperature Series 1, 2, 6, 7, 8-- 10 C + 120 C-- 15 C + 120 C-- 30 C + 120 C-- 30 C + 120 Cfor standard versionSeries 3, 4, 5--10 C +80 C--15 C +80 C--30 C +80 C--30 C +80 CMedium temperature Series 1, 2, 6, 7, 8-- 10 C + 150 C-- 15 C + 150 C-- 30 C + 130 C-- 30 C + 150 Cfor high temperature versionSeries 3, 4, 5on requeston requeston requeston requestMedium temperatureSeries 1, 2, 6, 7, 8--10 C +80 C--15 C +80 C--30 C +80 C--30 C +80 Cfor-versionSeries 3, 4, 5--10 C +80 C--15 C +80 C--30 C +80 C--30 C +80 CKRACHT GmbH Postbox 1420/1440 D-58774 Werdohl Phone 0049 (23 92 ) 935-0 Fax 0049 (23 92 ) 935 209 Internet: e-mail: codeNominal sizeProduct nameType codeSealSeriesConnection typeElectronicsSpecial ID :Nominal size / Seal FKM /Series 1 / Plate mounting /Electronic 1 3 5A TFE/P FFKM EEPDM PFEP1 2 3 4 5 6 7 8see series selectionPPlate mounting RPipe connectionVC 0,2 F1PS /.

8 SStandard(--30 .. +120 C)Hhigh temperature(--30 .. +150 C)V without preamplifier (for plug-in display SD1) Xintrinsically safe(switching amplifier has to be ordered separately)Special 8 Version with aluminium connection box and preamplifier VV12with Cannon plug641 Skydrol versionwith Aluminium connection box with Cannon plug,housing and cover nickel plated651with separate preamplifier and Cannon plug, for ambient temperature > 80 C711 8 Version with Hirschmann connector and round connector M 12 x 1741 8 Version with Hirschmann connector and preamplifier VV12 for 12 Volt power supply( 16 Volt)791VC 3 and VC 5 in high pressure version (400 bar)831 8 Version with aluminium connection box and cable glandincl.

9 Switching amplifier (no ex-protection), for ambient temperature > 80 C991VC 3 and VC 5 in high pressure version (400 bar)Skydrol resistent, with aluminium connection box and Cannon plug,housing and cover nickel plated7 KRACHT GmbH Postbox 1420/1440 D-58774 Werdohl Phone 0049 (23 92 ) 935-0 Fax 0049 (23 92 ) 935 209 Internet: e-mail: characteristicsSignal output channel 124 Volt (brown)channel 1 (green)channel 2 (yellow)0 Volt (white)Signal output channel 2 Signal-characteristicsChannel IA rising edgeB one pulse (corr. to flow rate of geom. tooth volume Vgz)C falling edgeD ON phaseE OFF phaseF pulse duty factor 1 : 1 15 %ChannelIIG channel offsetH flow direction 1K Reversal of flow directionJ flow direction 2 Electrical characteristicsNumber of measuring channels 2 Operating voltageUop= 12.

10 30 VDCpolarizedPulse amplitudeUout UopPulse shape withsymm. output signalsquare wavepulse duty factor / channel1:1 15 %Signal outputPNP (NPN on request)BCDEFG1A1324 III90 30 15 KHJUAUAE lectrical connectionPulse offset betweentwo channels90 30 Power requirementPb max= WOutput power/channelPamax= Wshort-circuit-proofDegree of protectionIP 65 DIN 40050 KRACHT GmbH Postbox 1420/1440 D-58774 Werdohl Phone 0049 (23 92 ) 935-0 Fax 0049 (23 92 ) 935 209 Internet: e-mail: design (ATEX)1011 12789456123123 Safe areaK 130 VCPotentially explosive atmosphereChannel 224 volt7, 8 and 9 jumperedshieldgreenyellow0 voltwhitebrownyellowgreenPAbrownwhiteCha nnel 1 Technical data of switching amplifier K-130 / 3-E-10 Power supplySupply voltage cl.