GR All-metal miniature flowmeters DK 32/34 - rehe …

1 GR KROHNE 04 miniature flowmeters DK 32/34 Variable area flowmetersVortex flowmetersFlow controllersElectromagnetic flowmetersUltrasonic flowmetersMass flowmetersLevel measuring instrumentsCommunications technologyEngineering systems & solutionsSwitches, counters, displays and recordersHeat meteringPressure and temperatureAll- metal miniature flowmeters DK 32/34 OptionsDK 32 with horizontal connections Valve in the top connection block A maximum of two adjustable limit switches (K1/K2), the set limitsare indicated on the scale. Connection of a differential pressure regulator is 34 with vertical connections A maximum of two adjustable limit switches (K1/K2), the set limitsare indicated on the DK 32/34 are all metal flowmeters that are suitable for a wide range of DK 32 has horizontal DK 34, in contrast, has vertical connec-tions.

2 The meters are otherwise coneLocal mechanicalindicatorDiff pressure regulator(optional DK 32)Calibrated to VDIFine adjusting valve(optional DK 34)stainless steel top and bottom blocksDK 32 / DK 343DK 32 / DK34 Responsibility as to suitability and intended use of our instruments rests solely with the range(100% values)Water at 20 C (68 F)3 to 100 l/h ( to US GPM)Option max. 160 l/h ( US GPM)Air at bar abs., 20 C ( psia, 68 F)50 to 3400 l/h ( to SCFM)Option max. 4000 l/h ( SCFM)Turn-down ratio10:1 Accuracy class(to VDI/VDE Code 3513, Sh. 2)4Ea= AC (25 + )FEa= Error (% actual) F = % Full scale flow AC = Accuracy ClassScale graduationflow unitsMax.

3 Allowable operating pressureat 20 C (68 F).130 bar (1885 psig)Test pressure is times the specified operating pressure. Information on higher pressure levels supplied on requestMax. process temperatureWithout option K, 80 C to +150 C ( 112 F to +302 F)With option K(Ambient temperature Ta)VersionMax. process temperatureTa < 40 C (< 104 F)Ta < 50 C (< 122 F)Ta < 60 C (< 140 F)DK 32 / K, DK 34 / K145 C 293 F135 C 275 F125 C257 FConnectionsStandard1/4 NPT female threadAdaptersErmeto 6 or 8, Serto 6 or 8,Dilo, Gyrolok, SwagelokMaterialsConnection blocksCrNi steel (318 C 17)Housingdie-cast zincCone, float, valve, plugCrNi steel (316 Ti)GasketsPTFEL imit switchTypeSC 2-N0 Number, connectionRight-angle plug, style to DIN 43650/ISO 4400,with PG 11 cable glandSignal cable m (5 ft)

4 Non-detachableProtection category to EN 60529/IEC 529IP 65, equivalent to NEMA 12 and 13An isolation switching amplifier is required to operate the SC 2-N0 Technical dataDK 32 / DK 34DK 32 / DK 344 Reference conditionsWater at 20 C (68 F)Airat 20 C, bar abs. (68 F, psia)100% Flow values, Turn-down ratio 10 : 1 Cone spindleWaterAirmax. pressure lossdiametermminchesl/hUS GPMl/hSCFM mbarpsigK 32DK 34 Weight: kg ( lbs)Weight: kg ( lbs)Flow tableDimensions and weights in mm (inches)DK 32 / DK 345DK 32 / DK 34 Differential pressure regulatorsDifferential pressure regulators are used to help maintain constant flow rates at fluctuating operating pressure.

5 Minimum pressure levels are required to permit operation of the regulators (see regulator characteristics) Differential pressure regulators are not pressure reducing valves Max. flow rate: 4000 I/h ( SCFM) air or 160 I/h ( USGPM) water. Pressure levels:CrNi steel (316 Ti) up to max. 25 bar (363 psig)[option 64 bar (928 psig)]Brass up to max. 16 bar (232 psig) Temperatures up to max. 80 C (176 F) [option 150 C (302 F)]Application rangesInlet pressure regulators, type RE, NREThe RE and NRE regulators help maintain a constant flowrate for gasesand liquids at variable inlet pressure and constant outlet pressure regulators, type RA, NRAFor gaseous products, the RA and NRA regulators help maintain a constant flowrate at variable outlet pressure and constant inlet order to function, the outlet pressure regulator requires a specificminimum pressure difference between inlet and outlet pressure p1must always be greater than outlet pressure MaterialMax.

6 Measuring **Air**inlet pressure p1differential pressure*Inlet pressure regulatorsl/hUS GPMl/hSCFMp1in barp1in psig p in bar p in psigRE-1000-RRE 10stainless RE-1000-NRE RE-4000-RRE 40stainless RE-4000-NRE NRE-800-RNRE 8stainless steel NRE-800-NNRE 8brass Outlet pressure regulatorsRA-1000-RRA 10stainless 40stainless 0, 8stainless steel 8brass ** Differential pressure between inlet and outlet pressures** Reference conditions: 20 C (68 F), bar abs. ( psia).70 ( )dia. 8 ( )90 ( ")70 ( ) 163 ( )1/4 NPTdia. 90 ( ")1/4 NPTdia.

7 90 ( )70 ( )90 ( ")dia. 8 ( ) 163 ( )70 ( )DK 32 / DK 346 REWeight approx. ( lbs.)Weight approx. ( lbs.)RALimit switch SC 2-N0 for DK 32 and DK 34 The SC 2-N0 limit switch is a slot sensor with built-in sensor is activated by the dipping action of an aluminium vanethat is mounted on the pointer shaft of the limit switches can be set over the full measuring set limits are indicated on the isolation switching amplifier is required for operation of one limit data SC 2-N0 Rated voltage8 V DCPower consumption active area clear3 mA active area obscured1 mAProtection category EN 60529/lEC 529 IP 67 (NEMA 6) Ambient temperature 25 C to +100 C( 13 F to 212 F)

8 Electromagnetic compatibility (EMC)to EN 50081-1, EN 50082-2 Electrical characteristics to DIN EN 50227 (NAMUR)Only relevant for use in hazardous areasOnly for connection to intrinsically safe circuits with the followingpeak values:No-load voltage VShort-circuit voltage IK52 mAOutput P 169 mWSelf-inductance (Li)150 HSelf-capacitance (Ci)150 nFIndividual approvalPTB-No. approvalPTB 99 ATEX 2191 Isolation switching amplifier Power supply Channel Order V V V V V V DC25015262500 Regulator characteristicsInlet pressure regulators Type RE, NREO utlet pressure regulators Type RA, NRAE xample: variable inlet pressure 6 bar ( 87 psig)Air at 20 C (68 F), bar abs.

9 ( psia)qv= flow rateExample: inlet pressure 6 bar (87 psig), variable outlet pressure < bar (< 80 psig)Air at 20 C (68 F), bar abs. ( psia) qv= flow rateDK 32 / DK 34 Dimensions in mm (inches)(use dimensions for installation)l/h(SCFM)qvp1= inlet pressure in bar (psig)l/h(SCFM)qvp2= outlet pressure in bar (psig)01( )2( )3( )4( )5( )6( )01( )2( )3( )4( )5( )6( )5000( )4000( )3000( )2000( )1000( )5000( )4000( )3000( )2000( )1000( )