Pressure Switches-information - Condor Werke

Pressure switches-informationPressure switches-information12Setting referenceA short overview regarding pressure andpressure differential settings of a pressureswitchP. 13High performance pressure switchesfor AC currentsTechnical data synoptic tables which enablequick selection of a required pressure switchP. 15High performance pressure switchesfor 3-phase currentsTechnical data synoptic tables which enablequick selection of a required pressure switchP. 16Control pressure switchesTechnical data synoptic tables which enablequick selection of a required control pressureswitchP. 17Type codeFor high performance pressure switches andcontrol pressure switch MDR 43 and MDR 53For decoding match codes of the differentpressure switch types and accessoriesP. 19Type codefor control pressure switch MDR-FFor decoding match codes of the differentpressure switch types and accessoriesP. 21Media resistance tablesFor selecting a suitable pressure switchfor a given mediaP. 22

Pressure switch setting referencesPressure switchesPressure switch settingsPressure switches are typically used to maintain pressure in a tank (or similarclosed system) between a pre-set upper and lower pressure value. In a“standard action“ or Normally Closed (NC) pressure switch application, theupper pressure value at which a pressure switch breaks an electric circuit iscalled the cut-out pressure. The lower pressure value by which the pressureswitch makes an electric circuit is called the cut-in pressure. Both cut-out andcut-in pressures within a given range can be adjusted on the pressure switch.In a "reverse action“ or Normally Open (NO) pressure switch application, theupper setting point makes an electric circuit and the lower setting point breaksthe electric circuit. The pressure switch related difference between cut-in andcut-out pressures is called “hysteresis“. Every pressure switch allows thenatural differential or hysteresis to be increased by a differential adjustmentscrew. An easy two-point control with a pressure switch is thus feasible.Please make sure all power is disconnected before attempting to adjustpressure settings! When calibrating the pressure switch it will be necessaryto apply pressure to the device. Use a calibrated pressure gage to adjust theswitches set points.Control pressure switchesControl pressure switches represent a special group within pressure switches.These devices are especially suitable for monitoring and controlling purposes.Depending on the model, SPDT's with or without gold flashed contacts, forexample, for PLC applications or isolated NO and NC contacts are available.Depending on the pressure switch type, Ioads with a max. power consumptionof 1.1 kW can be started directly.Pressure switchesinformationPressure switch setting referencesWhen the main pressure spring is adjusted, the cut-in and cut-out value of allpressure switches change proportionally. In other words, the differentialpressure remains the same. If the range between cut-in and cut-out value is tobe increased, the differential pressure screw must be used.When carrying out a differential pressure adjustment on the pressure switchtypes MDR 1, MDR 11, MDR 2 and MDR 21 the cut-out pressure value changesand the cut-in pressure value remains constant. (Notice: As a standard, theMDR 1 / MDR 11 are delivered without a differential adjustment screw but adifferential adjustment screw is available as an accessory).For all other pressure switch types the cut-in pressure value changes and thecut-out pressure value remains constant.In the pressure diagram, each pair of cut-in and cut-values are represented by apoint. If the point is within the shaded area of the diagram, then these pair ofvalues can be set on the pressure switch. If the point is outside the shaded area,then these pair of values cannot be set on the pressure switch.Unloader valves- (EV) and delayed unloader valves (AEV)Air compressor applications particularly reciprocating compressors, often usewhat is called an unloader valve. The function of the unloader valve is toremove the pressure from the piston of a compressor so that when it re-startsit can move freely and prevent the motor from stalling. The delayed unloadervalve, on the other hand, additionally assists the motor when starting in that itremains open until a certain pressure (approx. 2 bars) is reached, thus givingthe motor additional time to reach its full speed and torque.The Installation instructions for our unloader valves, containing all the technicaldata and variations, are available for download on our homepage.www.condor-cpc.com13

General information on pressure switchesExample of a pressure setting using the MDR 5 pressure diagramThe coordinates of a cut-out pressure of 4 bar and a cut-in pressureof 2 bar intersect at a point P1 which lies within the shaded pressurerange (pressure diagram of the respective pressure switch).These two values can be adjusted on the pressure switch MDR 5/5.The coordinates of a cut-out pressure of 4 bar and a cut-in pressureof 1 bar intersect at a point P2 which lies outside the shadedpressure range of the diagram. Accordingly, this pair of pressurevalues cannot be adjusted on the pressure switch MDR 5/5.Flange versionsMany pressure switches are available with different flanges.The (first) dimension refers always to the main pressure port. All otherports are always 1/4" ports.Flange F4 ½" 4 ports3 x ¼"1 x ½" - Main pressure portRepeatabilityThe permissible tolerance of the switching values (repeatability)is 3% less than the upper range value.ServiceOur service offers you the possibility of carrying out pressure settingsdepending on your requirements.Of course, we can also mount any accessories you may need on demand,profiting at the same time from a complete warranty.14The name F4 ½” means that there is a flange with 4 ports, in which themain pressure port is ½” female and the remaining 3 ports are ¼” female.The example illustrates this fact:

High performance pressure switches for AC currentsPressure switchesinformationOverviewType designationMDR 1MDR 1MDR 11MDR 11MDR 2MDR 21airwaterairwaterair / waterair / waterNo. of poles2 pole2 pole2 pole2 pole2 pole2 poleContact function2 N.C.2 N.C.2 N.C.2 N.C.2 N.C.2 N.C.Voltage230 V230 V230 V230 V230 V230 VMotor switching capacity4,0 kW4,0 kW4,0 kW4,0 kW2,2 kW2,2 kW20 A20 A20 A20 A16 A24 AG 1/4"F4 1/4"F4 3/8"F4 ¼“ NPTG 1/4“ steelG 1/4“ steel ÜG 1/4"F4 1/4"F4 3/8"F4 1/4" NPTG 1/4" steelG 1/4" steel ÜG 1/4"F4 1/4"F4 3/8"F4 1/2"G 1/4"F4 1/4"F4 3/8"F4 1/2"F4 1/4“ NPT1111222,5 - 112,5 - 62,5 - 112,5 - 61,5 – 121,5 – 12IP 44IP 44IP 41/44IP 41/44IP 44IP 41/44-5 80 C-5 80 CMedia *¹Rated currentFlange types *²Pressure ranges (bar) Cutout pressurefrom - toDegree of ProtectionPermissible mediatemperature: Air-5 80 C-5 80 CPermissible mediatemperature: WaterMax. cross-section(fine stranded)70 C70 C2,5 mm²2,5 mm²2,5 mm²2,5 mm²2,5 mm²2,5 mm²StandardCable glandswith PG 11 Z/ZKwith PG 11 Z/ZKwith PG 13,5 Z/ZKwith PG 13,5 Z/ZKwith 2 x WN *4(Accessory PG11 –13,5)with 2 x WN *4(Accessory PG11– 13,5)StandardOn / Off leverwith/withoutEAwithout EAwith EAwith EAwith/withoutEAwith/withoutEAwithoutdifferential setting(only as accessory)withoutdifferential setting(only as accessory)withoutdifferential setting(only as accessory)withoutdifferential setting(only as accessory)with tial settingwithoutwith AEV(Accessory EV)withoutwithout(Accessory EV, AEV)without(Accessory EV, AEV)StandardDifferential settingStandardDelayed (AEV)Unloader valve (EV)* Table refers to catalogue product*1Preferred / most used media, further media, see table on page 22 or on demand*2e.g. four-way flange F4 3/8“ (main connection G3/8“, additionally 3 x G 1/4“ ports)*3Ü switch need not be turned, use swivel nut for mounting*4WN grommetwww.condor-cpc.com15

High performance pressure switches for 3-phase currentsOverviewType designationMDR 3MDR 4MDR 4 SDMDR 4 SUMDR 5Air and waterAir and waterAir and waterAir and waterAir and waterNo. of poles3 pole3 pole3 pole3 pole3 poleContact function3 NC3 NC3 NC3 NO3 NCVoltage *3400 V400 V400 V400 V400 V7,5 kW (11 kW*6)5,5 kW5,5 kW4 kW5,5 kWG 1/2"G 1/4"F4 1/2"F4 3/8"F4 1/4"F4 1/4" NPTG 1/2"G 1/4"G 1/2“ G 1/4"F4 1/2"F4 3/8"F4 1/4"G 1/2"G 1/4"G 1/2"G 1/2"G 1/2“ G 1/4"IP 54IP 44IP 44IP 44IP 54 / IP 65*5Permissible media temperature:Air-5 80 C-5 80 C-5 80 C-5 80 C-5 80 CPermissible media temperature:Water80 C80 C80 C80 C80 C4,0 mm²2,5 mm²2,5 mm²2,5 mm²2,5 mm²StandardCable glandswith 2 x WN *4(Accessory PG11 - 16)with 2 x WN *4(Accessory PG11 – 13,5)with 2 x WN *4(Accessory PG11 – 13,5)with 2 x WN *4(Accessory PG11 – 13,5)without(Accessory M 20)StandardOn / Off leverwith/withoutEAwith/withoutEAwithout EAwithout EAwith/withoutEAStandardDifferential settingwith differentialsettingwith differentialsettingwith differentialsettingwith differentialsettingwith differentialsettingStandarddelayed (AEV) –unloader valve (EV)without(Accessory EV, AEV)without(Accessory EV, AEV)without(Accessory EV, AEV)without(Accessory EV, AEV)without(Accessory EV, AEV)Media *1MotorschaltvermögenFlange types *2Degree of protectionmax. cross-section(fine stranded)* Table refers to catalogue product16*1Preferred / most used media, further media, see table on page 22 or on demand*2e.g. four-way flange F4 3/8“ (main connection G3/8“, additionally 3 x G 1/4“ ports)*3Higher voltages on demand*4WN grommets*5Special execution without on / off switch*611 kW on request

Control pressure switchPressure switchesinformationOverviewMDR F.HDie-cast aluminumMDR-F.YPlasticMDR-F.HEStainless steelMDR-F.HHHigh pressureMDR-F.Reset function1 SPDT*11 SPDT*11 SPDT*11 SPDT*11 SPDT*1230 V230 V230 V230 V230 V0,55 kW0,55 kW0,55 kW0,55 kW0,55 kWCurrent AC 154A4A4A4A4AFlange typesStandard (bold)G 3/8"G 1/2"G 1/4"1/4“ NPTInner thread(Die-cast aluminum)G 3/8"Inner thread(plastic)G 1/4"Inner thread(Stainless steel)G 3/8"Inner thread(Stainless steel throttle)Type designationContact functionVoltageMotor switching capacityFurther flanges ondemandPressure ranges (bar)Cut-out pressurefrom - to65230,11 - 320,11 - 161 - 308 - 250as MDR-F.Hfurther pressure rangeson demandDegree of ProtectionIP 54 / IP 65IP 54 / IP 65IP 54 / IP 65IP 54 / IP 65IP 54 / IP 65Cable glandsWN / M 20WN / M 20WN / M 20WN / M 20WN / M 20- 25 . 70 C- 20 . 50 C200 C70 Caccording to selectionVdS to 16 barUL/GLAtexVdS to 10 barGL to 12,5 barAtexAtexUL / GLAtexGL on requestAtex on requestPermissible mediatemperature *²Type designation*1 SPDT with gold-flashed contacts for special applications on requestConnection systemIndustrial screw version(standard)Industrial clamp version(upon request)www.condor-cpc.com17

Control pressure switchOverviewType designationContact functionVoltageMotor switching capacityCurrent AC 15Flange typesStandard (bold)MDR - P1 SPDT*1/ 2 SPDT's1 SPDT*1MDR - KMDR 43MDR 532 SPDT's1 N:C:1 N.O.1 SPDT230 V230 V230 V230 V230 V0,55 kW0,55 kW0,55 kW1,1 kW0,55 kW4A4A4A8A4AG 1/4"Inner threadG 1/4"Outer threadG 1/4"Outer threadG 1/2"G 1/4"Inner thread(Die-cast aluminium)G 1/2"Inner thread(Die-cast aluminium)Pressure rangesCut-out pressurefrom to2optional344- 0,7 - 3 bar0,3 - 16 bar0,5 - 11 bar0,5 - 16 bar0,3 - 16 barDegree of ProtectionIP 54 / IP 65IP 65IP 67IP 44IP 54Cable glandsWN / M 20CouplingCouplingoptionaloptional- 25 . 70 C- 25 . 70 C- 40 . 70 C- 30 . 80 C- 30 . 80 CPermissible mediatemperature *²Type designation18MDR – F VacuumAtex*1 SPDT with gold-flashed contacts for special applications on request*2 further temperature ranges on request