Electro-Pneumatic Proportional Valve Series VEF/VEP

1 2(A)2(A)2(A)1(P)3(R)1(P)1(P)3(R) electro - pneumatic Proportional ValveSeries VEF/VEPW ithout sub-plateWithout sub-plateWithout sub-plateJIS SymbolFlowtype(VEF2)Flowtype(VEF3)Pressu retype(VEP3)03<Flow type> s or lessSpecificationsProportional Solenoid SpecificationsModelFlow typePressure typeItemAir3% or lessNot required (Use turbine oil Class 1, ISO VG32, if lubricated.)3% MPa0 to 50 C (With no condensation)VEF2121 VEF3121 VEF2141 VEF3141 VEF2121 VEP3121 s or s or s or less, ) The non-lubricated specification is not applicable to these , 4183, 41, 832183, 2143, 83, 2143030406253/81/23/403<Pressure type>41 1 VEP3112142 Nil02031/43/80304063/81/23/4 Standard characteristicsSet pressure range (MPa) to to to , VEF3121(Flow type)VEP3141(Pressure type)VEF2131(Flow type)VEP3121(Pressure type)VEF3141(Flow type)NilFNTRcGNPTNPTFNilFNTRcGNPTNPTFHow to OrderElectro- pneumatic Proportional Valve : Flow type (VEF)Controls the flow rate steplessly according to current.

2 (It is a 2/3 port Valve that has an electrical throttle Valve function.) A model that is suitable for operating conditions, such as the number of ports or maximum effective area, can be selected. Electro-Pneumatic Proportional Valve : Pressure type (VEP)Controls the pressure steplessly according to current. Also, because the effective fully opened area of the exhaust side is identical due to its construction, this Valve provides a large exhaust capacity and can be used as a relief Valve . (It is a 3 port Valve that has an electrical pressure reducing Valve function.)Port size Rc FluidMaximum operating pressureHysteresisSensitivityLinearityLu bricationMass (kg)Ambient and fluid temperatureResponse timeRepeatabilityMax. currentRated power consumptionCoil insulation typeMax. temperatureElectrical entryProportional solenoid recognition symbolApplicable power amplifierCoil resistanceVEA25 1 A1 (Applicable power amplifier: VEA25 )13 (Ambient temperature 20 C)Class H or equivalent (180 C)DIN terminal13 W (Ambient temperature 20 C, with maximum current)140 C (Ambient temperature 50 C, with maximum current)Body sizeBody sizeStandard characteristicsStandard characteristicsPort sizePort sizeApplicable power amplifierSymbol1 Applicable power amplifierThread typeThread typePortPor tSymbolBody sizeSymbolBody sizeSymbolStandard characteristicsMax.

3 Effective area (mm2)Port sizeSymbolPort sizeSymbolSymbolSymbol697 ARJAMRARMARPIRIRVVEX1 SRHSRPSRFARX20 VCHRITVICPVQVERVEAVY2AP100 VBAVBATAR425to 10:39 AM Page 697 Courtesy of Steven Engineering, Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) circuitElectro-pneumaticproportional Valve (Pressure control Valve )Regulator Valve (VEX1)PressurizingcylinderElectrodeCheck valvePower amplifierwith feedback circuitControl circuitPressure sensorCoolerRegulator Valve VEX1 Low pressure die-castingRelease valveVEXP3141 Electro-Pneumatic Proportional valveNumber ofrotationsFeedbackTachometerAir motorPower amplifier(Feedback circuit built-in type)ControlcircuitElectro-pneumaticprop ortional Valve (Flow type, 2 port)VEA10,VEPFBe sure to read before to front matters 42 and 43 for Safety Precautions and pages 287 to 291 for Precautions on every welding pressure of welding machine electrodeControlling rotation of air motorControlling pressure of low pressure die-castingControlcircuitPoweramplifierE lectro-pneumaticproportional Valve (Pressure control vlave)Regulator Valve (VEX1)Die cushion(Imagine air type shock absorber)

4 How to Use DIN TerminalWiring procedureWiringTerminal blockConnection 3 is not usedfor terminal 1 and ) Coil has no the retaining screw and pull the connector from the pin plug. sure to remove the retaining screw, insert the tip of a flat head screwdriver into the groove below the terminal block and pry it up to separate the terminal cover from the terminal block. connect the wires to the specified terminals in accordance with the wiring cable (Heavy-duty cable) mm2, mm2/2 core, 3 core ( to ) based on JIS C 3312 and C 3322 Outlet changing procedureTo change the wire outlet, first separate the terminal cover from the terminal , reinstall the terminal cover in the desired direction (in 90 increments).Pin plug shapePrecautionsCaution1. Air supply Poor quality air could increase the spool s sliding resistance, while preventing it from attaining its specified characteristics.

5 Use compressor oil with a minimal generation of oxidants and install a mist separator (SMC s AM Series ). Refer to pages 2 and 3. Avoid using ultra-dry air since it may reduce the amount of lubricant and shorten the service Mounting Vibrations are transmitted to the Valve by the Proportional solenoid s dither. If it is necessary to prevent the transmission of vibrations, insert vibration isolating rubber material. Thoroughly flush the pipe to completely eliminate any dust or scales from the pipe inside. Install a silencer (AN Series ) on the exhaust port. Be careful with the molded coil because it generates heat while current is applied to LubricationThis product can be used without lubrication. But if lubricated, use turbin oil Class 1, ISO VG32 (with no additive). It is impossible to use spindle oil, machine oil, or Manual operationTo check the operation of the Valve without applying a current, remove the lock nut and use a screwdriver or the like to press the tip of the core.

6 After checking the operation, reinstall the rubber cap in its original position. Previous TypeCautionVE 0 must be used in conjunction with the power amplifier VEA1 .The previous VE 0 cannot be used in combination with the current VEA25 , and the current VE 1 cannot be used in combin-ation with the previous VEA1 .PFPFPF698 Series VEF/VEPA pplication ExampleControlling pressure for die press cushionControlling multispeed of cylinderSurge absorberElectro- pneumatic Proportional valveFlow type (3 port) 10:39 AM Page 698 Courtesy of Steven Engineering, Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) (P)2 (A)3 (R)1 (P)2 (A)3 (R)1 (P)2 (A)1(P) 2(A) control1(P) 2(A) control3 portCurrent2 port2(A) 3(R) controlFlow rateClosedFully openFully openNote)F1 solenoidF2 springControlled openingSleeveSpool3 (R)Flow type: VEFNote) The areas between port 1 (P) and 2 (A) and between port 2 (A) and 3 (R) will not equal the effective area of 0 mm2 ( Valve closed) at the same time.

7 (Refer to the flow characteristics.)Diagram of Working PrincipleFlow Characteristics: 3 PortFlow Characteristics: 2 PortEffective area (mm2)Effective area (mm2)Effective area (mm2)Effective area (mm2)Current ACurrent ACurrent ACurrent AThe spool controls the sleeve s opening through the balance between the Proportional solenoid s pulling force (F1) and the spring s reaction force (F2). The spool moves in accordance with the amperage that is applied to the Proportional solenoid, thus controlling the flow VEF/VEPE lectro- pneumatic Proportional ValveARJAMRARMARPIRIRVVEX1 SRHSRPSRFARX20 VCHRITVICPVQVERVEAVY2AP100 VBAVBATAR425to 10:40 AM Page 699 Courtesy of Steven Engineering, Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) solenoidFeedback passage(Inlet pressure) (Outlet pressure)Set pointSet pointSet pointOutlet pressure (MPa)Outlet pressure (MPa)Outlet pressure (MPa)Outlet pressure (MPa)Outlet pressure (MPa)Outlet pressure (MPa)Outlet pressure (MPa)Inlet pressure: MPaInlet pressure: MPaInlet pressure: MPaPressure Type.

8 VEP1(P)2(A)3(R)1(P)2(A)3(R)1(P)2(A)3(R)F low Characteristics3(R) 2(A) Flow rate (l/min (ANR)) 1(P) 2(A)3(R) 2(A) Flow rate (l/min (ANR)) 1(P) 2(A)3(R) 2(A) Flow rate (l/min (ANR)) 1(P) 2(A)Inlet pressure (MPa)Inlet pressure (MPa)Inlet pressure (MPa)Current APressure CharacteristicsJIS B 8372 (In accordance with air regulator)Current-Pressure CharacteristicsThe horizontal axis of the characteristics represents the output amperage of the power amplifier VEA2555. (If NULL and GAIN are in the shipping condition, 0 to 1 A can be viewed by substituting them with command signals 0 to 5 V.)Diagram of Working PrincipleThe control opening becomes closed when the solenoid's pulling force (F1) balances with the force (F2), which is created by the outlet pressure that passes through the feedback passage and acts on the spool surface. As a result, the outlet pressure is 10:40 AM Page 700 Courtesy of Steven Engineering, Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) (P)Port3 (R)Port 1 (P)Port1 (P)Port 3 (R)Port 2 (A)Port 2 (A)ConstructionSub-plate and Gasket for VE 121 Part typePort size!

9 1 GasketDXT172-7!7 Hex. socket head cap screw (With SW)XT012-25D-1 (M4 x 32)NilFNTT hread typeRcGNPTNPTFS ymbol12 Port size1/43 paintedMetallic painted Metallic painted Aluminum alloyAluminum alloySpecial stainless steelSpecial stainless steel Aluminum alloy Aluminum alloyResinBrassNBRS tainless steel/Piano wireBrassNBRNBRNBRC hromium-molybdenumChromium-molybdenumChr omium-molybdenumNBRBodySub-plateSpoolSle eveMold coilSolenoid cap assemblyMovable core assemblyEnd coverBushSet bushingGasketSpringSpring seatO-ringO-ringO-ringHex. socket head cap screwHex. socket head cap screwHex. socket head cap screwLock nut1234567891011121314151617181920 Component PartsFlow type: VEF2121 (2 Port) VEF3121 (3 Port)Pressure type: VEP3121 (3 Port)Flow type: VEF2131 (2 Port)Flow type: VEF2141 (2 Port) VEF3141 (3 Port)Pressure type: VEP3141 (3 Port)F2P3701 Series VEF/VEPE lectro- pneumatic Proportional ValveARJAMRARMARPIRIRVVEX1 SRHSRPSRFARX20 VCHRITVICPVQVERVEAVY2AP100 VBAVBATAR425to 10:40 AM Page 701 Courtesy of Steven Engineering, Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) x x ,1142 xPort2 (A)Port2 (A)Plug1033 x 7 Mounting hole3 x4 x 91083814 Port 2 (A)Port 1 (P)Port 1 (P)Port3 (R)Port3 (R)Port1 (P)2 port: Port 3 (R) plug2 port: Port 3 (R) plugMounting holeG 1/2 Cabtire to , 1/2, 3/4 G 1/2 Cabtire to holeG 1/2 Cabtire to ,3/8,1/2 Flow type: VEF2121, VEF3121 Pressure type: VEP3121 Flow type: VEF2131 Flow type.

10 VEF2141, VEF3141 Pressure type: VEP3141 Dimensions702 Series 10:40 AM Page 702 Courtesy of Steven Engineering, Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800)