Pilot Valves For Pilot Operated Servo Valves
Data sheetPilot valves forpilot operated servo valvesThe range of pilot valves consists of: Constant-pressure pilot valve,type CVP (LP) and CVP (HP) Differential-pressure pilot valve,type CVPP (LP) and CVPP (HP) High pressure pilot valve, type CVP (XP)ideal for CO2 hot gas defrosting Pressure-operated pilot valve with referencepressure connection, type CVC Electronically operated constant-pressure pilotvalve, type CVQ (pressure-dependent) Solenoid pilot valve, type EVM (NC) Solenoid pilot valve, type EVM (NO) Housing, type CVH for pilot valves, formounting in external pilot linesPilot valves for direct mounting in main valvesFeatures Danfoss DCS (MWA) 2016.04 Applicable to all common non flammablerefrigerants including R 717 and non corrosivegases/liquids dependent on sealing materialcompatability. The pilot valves can be screwed direct intothe main valve, thus avoiding the necessity ofwelding, soldering and separate pilot lines. The pilot valves can be mounted direct in aICS or PM main valve or be connected via anexternal pilot line and a CVH housing. All pilot valves can be used on all sizes of mainvalves. Extremely accurate pressure and temperaturecontrol. Several pilot valves can be connected in seriesor in parallel to provide many functions in thesame ICS or PM main valve. All pilot valves are delivered with gaskets. Classification: DNV, CRN, BV, EAC etc.To get an updated list of certification on theproducts please contact your local DanfossSales Company.DKRCI.PD.HN0.B7.02 520H0831 1
Data sheet Pilot valves for pilot operated servo valvesContentsPageFeatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Constant-pressure pilot valve, type CVP (LP) and CVP (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Differential-pressure pilot valve, type CVPP (LP) and CVPP (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6High pressure pilot valve, type CVP (XP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Pressure-operated pilot valve with reference pressure connection, type CVC . . . . . . . . . . . . . . . . . . . . . . . . . 9Electronically operated constant-pressure pilot valve, type CVQ (pressure-dependent) . . . . . . . . . . . . . . 11Solenoid pilot valve, type EVM (NC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Solenoid pilot valve, type EVM (NO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Housing for pilot valves, type CVH, for mounting in external pilot lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Danfoss DCS (MWA) 2016.04DKRCI.PD.HN0.B7.02 520H0831 2
Data sheet Pilot valves for pilot operated servo valvesDesignEach pilot valve is designed to give the optimumcontrol accuracy within the specific functionrange of the valve.Several pilot valves can be mounted in seriesand/or in parallel on a ICS or PM main valve togive a very large number of functions.Technical dataRefrigerantsApplicable to all common non flammablerefrigerants including R 717 and non corrosivegases/liquids dependent on sealing materialcompatability.For further information please see installationinstruction for ICS valves or PM valves. Danfoss DCS (MWA) 2016.04Mounted in a CVH housing, the pilot valves canbe used in external lines, either as independentlyoperating valves or as external control valves forthe main valve.The pilot valves can be used for all sizes of ICS orPM main valves.Flammable hydrocarbons are not recommended.For further information please contact your localDanfoss Sales Company.Temperature and pressure ranges are givenseparately for the specific pilot valve.DKRCI.PD.HN0.B7.02 520H0831 3
Data sheet Pilot valves for pilot operated servo valvesConstant-pressure pilotvalve, type CVP (LP) and CVP(HP)Design and functionCVP is a constant-pressure pilot valve available inlow-pressure and high-pressure versions.The pilot valve is used to maintain a constantpressure on the ICS or PM main valve inlet side.The low-pressure version (LP) must not besubjected to pulsation.CVP (LP)Low-pressure versionCVP (HP)High-pressure versionWhen a CVP is mounted in a CVH housing, it canbe used as a separate constant-pressure valve ora pressure relief valve (e.g. to prevent hydraulicoverpressure in an entrapped liquid).Technical data, SI unitsMWP: Maximum working pressure.The kv/Cv value is measured with thepilot valve mounted in a CVH housingfor external pilot lines. The value canvary slightly, depending on the settingvalue.When CVP (HP) is used at a temperaturelower than –50 C (–58 F) the bolts mustbe replaced with stainless steel bolts(type 4, quality 80).The low-pressure version (LP) is nota serviceable type of pilot and it isrecommended to be replaced aftermax. 7 years in operation.Valve typeMWPkv-valueTemperature rangePressure rangeCode no.Low-pressure versionCVP (LP)17 bar g0.40 m3/h–50 to 120 C0 bar g to 7 bar g027B1100CVP (LP)17 bar g0.40 m3/h–50 to 120 C–0.66 bar g to 2 bar g027B1101High-pressure versionCVP (HP)28 bar g0.40 m3/h–50 to 120 C4 bar g to 22 bar g027B1160CVP (HP)28 bar g0.40 m3/h–50 to 120 C4 bar g to 28 bar g027B1161CVP (HP)28 bar g0.40 m3/h–50 to 120 C–0.66 bar g to 7 bar g027B1164CVP (HP)40 bar g0.40 m3/h–50 to 120 C4 bar g to 28 bar g027B1261Cv-valueTemperature rangePressure rangeCode no.Technical data, US unitsValve typeMWPLow-pressure versionCVP (LP)247 psi g0.46 US gal/min–58 to 248 F0 psi g to 102 psi g027B1100CVP (LP)247 psi g0.46 US gal/min–58 to 248 F19.5 in. Hg to 29 psi g027B1101High-pressure versionCVP (HP)406 psi g0.46 US gal/min–58 to 248 F58 psi g to 319 psi g027B1160CVP (HP)406 psi g0.46 US gal/min–58 to 248 F58 psi g to 406 psi g027B1161CVP (HP)406 psi g0.46 US gal/min–58 to 248 F19.5 in. Hg to 102 psi g027B1164CVP (HP)580 psi g0.46 US gal/min–58 to 248 F58 psi g to 406 psi g027B1261P-band for a valve system regulated by CVP and ICS or PM main valve: 0.2 bar g (2.9 psi g)Dimensions and weightsCVP (LP)Valve typeCVP (HP)HH1H2DBB132M 24 1.532M 24 1.5WeightLow-pressure versionCVP (LP)mm1229853in.4.803.862.090.4 kg0.88 lb.High-pressure versionCVP (HP)mm17014690in.6.695.753.541.7 kg3.75 lb.Weights are approximate values only Danfoss DCS (MWA) 2016.04DKRCI.PD.HN0.B7.02 520H0831 4
Data sheet Pilot valves for pilot operated servo valvesConstant-pressure pilotvalve, type CVP (LP) and CVP(HP)Material specification(continued)CVP (LP)CVP (HP)CVP (LP)Please note!In hot gas relief systemsDanfoss recommendsthe use of CVP-HP dueto the robust design suitablefor pulsations and temperaturefluctuations. CVP-LP is notrecommended.CVP ne (Neoprene)A1O-ringCloroprene tective capSteel1Protective capSteel3SealCloroprene (Neoprene)3SealNon-asbestos4NutStainless steel4NutStainless steel9Ball socketStainless steel10DiaphragmStainless steel10DiaphragmStainless steel11Thrust padStainless steel11Thrust padSteel12Spring guideStainless steel12Spring guideStainless steel14OrificeStainless steel13FlangeLow temperature cast iron(spherical)15BaseSteel14OrificeStainless steel17Valve bonnetLow temperature cast iron(spherical)15BaseSteel20Setting spindleStainless steel17Valve bonnetLow temperature cast iron(spherical)24SpringSteel18Cover boltSteel20Setting spindleStainless steel21Screw (M6 10)Steel22Cover SNVSVAICM“Wet” return lineCHVNCCVPICS 3SVASNVSVAFIASVAREGCHVICS 1Liquid line (pump)EVRSSNVSVA Danfoss DCS (MWA) 2016.04ICS 1FIASVAHot gas lineDKRCI.PD.HN0.B7.02 520H0831 5
Data sheet Pilot valves for pilot operated servo valvesDifferential-pressure pilotvalve, type CVPP (LP) andCVPP (HP)Design and functionCVPP is a differential-pressure pilot valveavailable in low-pressure and high-pressureversions.The pilot valve is used to maintain a constantdifferential pressure between the CVPP valvereference pressure connection and the ICS or PMmain valve inlet pressure.CVPP (HP)High-pressure versionCVPP (LP)Low-pressure versionCVPP incorporates a diaphragm so that thereference pressure and the refrigerant in thevalve are physically separated. The pilot valve cantherefore also be used as a pneumatic controlvalve either to control a ICS or PM main valve oras a separate pneumatic valve mounted in a CVHhousing.Technical data, SI unitsMWP: Maximum working pressure.The kv/Cv value is measured with thepilot valve mounted in a CVH housingfor external pilot lines. The value canvary slightly, depending on the settingvalue.When CVPP (HP) is used at atemperature lower than –50 C(–58 F) the bolts must be replaced withstainless steel bolts (type 4, quality 80).The low-pressure version (LP) is nota serviceable type of pilot and it isrecommended to be replaced aftermax. 7 years in operation.Valve typeMWPkv-valueTemperature rangePressure range ( p)Code no.0.40 m3/h–50 to 120 C p 0 to 7 bar g027B1102Low-pressure versionCVPP (LP)17 bar gHigh-pressure versionCVPP (HP)28 bar g0.40 m3/h–50 to 120 C p 0 to 7 bar g027B1162CVPP (HP)40 bar g0.40 m3/h–50 to 120 C p 4 to 22 bar g027B1268Cv-valueTemperature rangePressure range ( p)Code no.0.46 USgal/min–58 to 248 F p 0 to 102 psi g027B1102Technical data, US unitsValve typeMWPLow-pressure versionCVPP (LP)247 psi gHigh-pressure versionCVPP (HP)406 psi g0.46 USgal/min–58 to 248 F p 0 to 102 psi g027B1162CVPP (HP)580 psi g0.46 USgal/min–58 to 248 F p 58 to 319 psi g027B1268P-band for a valve system regulated by CVPP and ICS or PM main valve: 0.2 bar g (2.9 psi g).Dimensions and weightsCVPP (LP)Valve typeHCVPP (HP)H1H2LL1DBB132M 24 1.532M 24 1.5WeightLow-pressure versionCVPP (LP)mm136112532653in.5.354.412.091.022.090.5 kg1.1 lb.High-pressure versionCVPP (HP)mm170146906in.6.695.753.540.241.7 kg3.7 lb.Weights are approximate values only Danfoss DCS (MWA) 2016.04DKRCI.PD.HN0.B7.02 520H0831 6
Data sheet Pilot valves for pilot operated servo valvesDifferential-pressure pilotvalve, type CVPP (LP) andCVPP (HP)Material specification(continued)CVPP (LP)CVPP (LP) Danfoss DCS (MWA) 2016.04CVPP (HP)CVPP ne (Neoprene)A1O-ringCloroprene tective capSteel1Protective capSteel3SealCloroprene (Neoprene)3SealNon-asbestos4NutStainless steel4NutStainless steel6NippleSteel6NippleSteel7Union nutSteel7Union nutSteel8SealAluminium8SealAluminium9Ball socketStainless steel10DiaphragmStainless steel10DiaphragmStainless steel11Thrust padStainless steel11Thrust padSteel12Spring guideStainless steel12Spring guideStainless steel14OrificeStainless steel13FlangeLow temperature cast iron(spherical)15BaseSteel14OrificeStainless steel17Valve bonnetLow temperature cast iron(spherical)15BaseSteel20Setting spindleStainless steel17Valve bonnetLow temperature cast iron(spherical)24SpringSteel18Cover boltSteel (8.8)28SpringSteel20Setting spindleStainless steel21Screw (M6 10)Steel22Cover PD.HN0.B7.02 520H0831 7
Data sheet Pilot valves for pilot operated servo valvesHigh pressure pilot valve,type CVP (XP)Design and functionCVP (XP) is a constant-pressure pilot valveavailable in high-pressure version. The CVP(XP) ensures an efficient and stable CO2 hot gasdefrost process.The pilot valve is used to maintain a constantpressure on the ICS or PM main valve inlet side.When a CVP is mounted in a CVH housing, it canbe used as a separate constant-pressure valve ora pressure relief valve (e.g. to prevent hydraulicoverpressure in an entrapped liquid).CVP (XP)High pressure pilot valveMWP: Maximum working pressure.The kv/Cv value is measured with thepilot valve mounted in a CVH housingfor external pilot lines. The value canvary slightly, depending on the settingvalue.Technical data, SI unitsValve typeMWPkv-valueTemperature rangePressure rangeCode no.High-pressure versionCVP (XP)52 bar g0.45 m3/h–50 to 120 C25 bar g to 52 bar g027B0080CVP (XP)52 bar g0.45 m3/h–50 to 120 C10 bar g to 40 bar g027B0090Cv-valueTemperature rangePressure rangeCode no.Technical data, US unitsValve typeMWPHigh-pressure versionCVP (XP)754 psi g0.52 USgal/min–58 to 248 F363 psi g to 754 psi g027B0080CVP (XP)754 psi g0.52 USgal/min–58 to 248 F145 psi g to 580 psi g027B0090P-band for a valve system regulated by CVP and ICS or PM main valve: 1.6 bar g (23.2 psi g)Dimensions and weightsCVP (XP)Valve typeCVP-XPHH1H2mm19016690in.7.486.543.54Material specificationB132M24 1.5Weight1.9 kg4.2 lbCVP (XP)No.CVP (XP) Danfoss DCS (MWA) 2016.04BPartMaterial1Protective capSteel3SealCloroprene (Neoprene)4NutStainless steel10DiaphragmStainless steel11Thrust padSteel12Spring guideStainless steel13FlangeLow temperature cast iron(spherical)14OrificeStainless steel15BaseSteel17Valve bonnetLow temperature cast iron(spherical)18Cover boltStainless steel20Setting spindleStainless steel22Cover ngCloroprene (Neoprene)A2SealNon-asbestosDKRCI.PD.HN0.B7.02 520H0831 8
Data sheet Pilot valves for pilot operated servo valvesPressure-operated pilotvalve with referencepressure connection,type CVCDesign and functionCVC is a pressure-operated pilot valve witha connection that can be used to obtain anindication of the system reference pressure.CVC valves are used:together with a PMC main valve to regulatecapacity using hot gas bypass;together with a ICS or PM main valve toregulate max. suction pressure, e.g. as acompressor crankcase pressure regulator;together with a ICS or PM main valve as apressure limiter, e.g. for hot gas defrost of hotgas lines.CVC (LP)CVC (XP)Technical data, SI unitsThe reference pressure must beconnected to the low-pressure side ofthe system.The kv/Cv value is measured with thepilot valve mounted in a CVH housingfor external pilot lines. The value canvary slightly, depending on the settingvalue.Valve typeMWPkv-valueTemperature rangePressure rangeCode no.0.20 m3/h–50 to 120 C–0.5 bar g to 9 bar g027B10800.20 m3/h–50 to 120 C4 bar g to 28 bar g027B0087Cv-valueTemperature rangePressure rangeCode no.0.23 USgal/min–58 to 248 F14.8 in. Hg to 131 psi g027B10800.23 USgal/min–58 to 248 F58 psi g to 406 psi g027B0087Low-pressure versionCVC (LP)28 bar gHigh-pressure versionCVC (XP)52 bar gTechnical data, US unitsValve typeMWPLow-pressure versionCVC (LP)406 psi gHigh-pressure versionCVC (XP)754 psi gP-band for a valve system regulated by CVC and ICS/PM/PMC: 0.3 bar g (4.4 psi g)Dimensions and weightsCVC (LP)CVC (XP)Valve typeHH1H2LL1DBB1B2B3Weight32G 1/419M 24 1.52.0 kgCVC (LP) and CVC 4.4 lb.Weights are approximate values only Danfoss DCS (MWA) 2016.04DKRCI.PD.HN0.B7.02 520H0831 9
Data sheet Pilot valves for pilot operated servo valvesMaterial specificationCVC (XP)CVC (LP)DanfossM27B0004 1Pressure-operated pilotvalve with referencepressure connection,type CVC(continued)11317CVC (XP) Danfoss DCS (MWA) 2016.04CVC 3SealAluminium44Blanking plug forpressure gaugeconnectionStainless steel44Blanking plug forpressure gaugeconnectionSteel81O-ringCloroprene (Neoprene)81O-ringCloroprene (Neoprene)103Banjo fittingSteel103Banjo fittingSteel104O-ringCloroprene (Neoprene)104O-ringCloroprene (Neoprene)105Protective capSteel105Protective capSteel106O-ringCloroprene (Neoprene)106O-ringCloroprene (Neoprene)108Pilot orificeStainless steel108Pilot orificeStainless steel109Connector on banjofitting 103Steel109Connector on banjofitting 103Steel110DiaphragmStainless steel110DiaphragmStainless steel111SpringSteel111SpringSteel112Setting spindleStainless steel112Setting spindleSteel17Valve bodySteel113Nut (M10, HEX 17)SteelA1O-ringCloroprene (Neoprene)17Valve bodySteelA2SealNon-asbestosA1O-ringCloroprene (Neoprene)A2SealGraphiteDKRCI.PD.HN0.B7.02 520H0831 10
Data sheet Pilot valves for pilot operated servo valvesElectronically operatedconstant-pressure pilotvalve, type CVQ (pressuredependent)Design and functionCVQ is an electronically operated constantpressure pilot valve that functions together withthe EKC 361 electronic system or an EKC 366controller.CVQ enables the electronic (and thus the remote)control of a ICS or PM main valve.The CVQ valve is used to maintain a constantpressure at the ICS or PM main valve inlet sideand can, via suction pressure regulation, veryaccurately control the temperature of a mediumfrom an air or liquid cooler, etc.CVQMWP: Maximum working pressure.The kv/Cv value is measured with thepilot valve mounted in a CVH housingfor external pilot lines. The value canvary slightly, depending on the settingvalue.Technical data, SI unitsValve typeMWPkv-valuePressure rangeCode no.CVQ17 bar g0.45 m3/h–1 bar g to 5 bar g027B1139CVQ17 bar g0.45 m3/h0 bar g to 6 bar g027B1140CVQ17 bar g0.45 m3/h1.7 bar g to 8 bar g027B1141Technical data, US unitsValve typeMWPCv-valuePressure rangeCode no.CVQ246 psi g0.52 USgal/min–29.5 in. Hg to 72.5 psi g027B1139CVQ246 psi g0.52 USgal/min0 psi g to 87 psi g027B1140CVQ246 psi g0.52 USgal/min24.7 psi g to 116 psi g027B1141The P-band for a valve system regulated by CVQ and ICS or PM depends on the control parameters ofthe EKC 361 or EKC 366.Electrical dataSupply voltage24V a.c. 10%Frequency50 to 60 HzPower consumption,operationstart50 VA75 VAEnclosureNEMA 3 / IP 55Cable entryPg 13.5Ambient temperature, operationtransport–30 to 50 C (–22 to 122 F)–50 to 70 C (–58 to 158 F)EMC-Directive 89/336/EEC, EMC-Directiv 89/336/EN 50081-1 and EN 50082-1-markingDimensions and weightsCable entry Pg 13.5CVQValve typeCVQ Danfoss DCS (MWA) 6BB132M 24 1.5Weight0.4 kg0.9 lb.DKRCI.PD.HN0.B7.02 520H0831 11
Data sheet Pilot valves for pilot operated servo valvesElectronically operatedconstant-pressure pilotvalve, type CVQ (pressuredependent)Material specification(continued)CVQDesign and functionCVQ consists of a reservoir containing a chargeat a given pressure, a heating element and atemperature sensor.When the temperature in the container isregulated, the corresponding and precisepressure change created changes the degree ofopening of the orifice (9 and 10) and thus thecontrol pressure sent by the CVQ valve to theconnected ICS or PM main valve.If pressure in the container becomes too high,an internal protection system short-circuits theheating element and thus stops pressure buildup. Danfoss DCS (MWA) 2016.04CVQNo.PartMaterial1CoverPlastic2Connection terminals3NTC resistor4PTC resistor (heatingelement)5ReservoirSteel6DiaphragmStainless steel7CapsulePlastic9OrificeStainless steel10Thrust pad with throttleballStainless steelA1O-ringCloroprene (Neoprene)A2SealNon-asbestosDKRCI.PD.HN0.B7.02 520H0831 12
Data sheet Pilot valves for pilot operated servo valvesSolenoid pilot valve,type EVM (NC)Design and functionEVM is a solenoid pilot valve for use when on/offoperation of the ICS or PM main valve is required.EVM valves are intended for use with Danfosssolenoid valve coils (“Coils for solenoid valves”,datasheet RD3JB).Solenoid pilot valve,type EVM (NO)Together with CVH, an EVM can also be
Data sheet Pilot valves for pilot operated servo valves Danfoss DCS (MA) 2016.04 DKRCI.PD.HN0.B7.02 520H0831 6 Differential-pressure pilot valve, type CVPP (LP) and CVPP (HP) CVPP is a differential-pressure pilot valve
Solenoid Controlled Pilot Operated Directional Valves Solenoid Controlled Pilot Operated Directional Valves These valves are composed of a solenoid operated pilot valve and a pilot operated slave valve. When a solenoid is energised the pilot valve directs the flow to move the spool of the slave valve, thus changing the direction of flow in the .
Pilot Operated Directional Valves Catalog DG3V-10 Hydraulic Pilot Operated; 1100 l/min (290 USgpm) 350 bar (5000 psi) DG5V-10 Solenoid Pilot Operated; 1100 l/min (290 USgpm) 350 bar (5000 psi) NFPA D10, ISO-4401-10, CETOP 10. 2 EATON Vickers Pilot Operated Directional Valves Catalog V-VLDI-MC004-E March 2007 . integral check valves and port .
Pilot-operated servo valve Type ICS ICS pilot-operated servo valves belong to the ICV (Industrial Control Valve) family. The valve comprises three main components: valve body, function module and top cover. ICS pilot-operated servo valves are pilot operated valves for regulating pressure, temperature and ON/OFF function in refrigeration systems.
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