Electro-pneumatic Proportional Valve. Specifications. Model Flow type Pressure type VEF2121

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1 Courtesy of CMA/Flodyne/Hydradyne Motion Control Hydraulic Pneumatic Electrical Mechanical (800) <Flow type> VEF Port Port Applicable power Body size Body size Electro-pneumatic Proportional Valve Electro-pneumatic proportional valve: Flow type (VEF) Controls the flow rate steplessly according to current. (It is a / 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 port valve that has an electrical pressure reducing valve function.) VEF (Flow type) VEP (Pressure type) VEF (Flow type) VEA5 0 Standard characteristics Standard characteristics Max. effective area (mm ) VEP (Pressure type) VEF (Flow type) Specifications Item Rc Fluid Proof pressure Maximum operating pressure Ambient and fluid temperature Response time Hysteresis Repeatability Sensitivity Linearity Lubrication Weight (kg) Nil Nil 0 0 How to Order Without sub-plate Rc / Rc /8 Rc / Rc /8 Rc / Rc /8 Rc / Rc / Without sub-plate Rc / Rc /8 Model Flow type Pressure type VEF VEF VEF VEF VEP VEP VEF, 8, 8, 8,,, 8 8,, Air (Inert gas).5 MPa.0 MPa 0 to 50 C (With no condensation) 0.0 s or less 0.05 s or less 0.0 s or less 0.05 s or less % F.S. % F.S. 0.5% F.S. % F.S. or less Not required (Use turbine oil Class, ISO VG, if lubricated.) Proportional Solenoid Specifications Proportional solenoid recognition symbol (Applicable power : VEA5 ) Applicable power VEA5 Max. current Coil resistance Rated power consumption Coil insulation type Max. temperature Electrical entry Thread type Nil Rc F G N NPT T NPTF Rc /8 Rc / Rc / <Pressure type> VEP Applicable power VEA5 A Ω (0 C) W (0 C, with maximum current) Class H or equivalent (80 C) 0 C (With maximum current) DIN terminal 0 Standard Body size characteristics Body size Standard characteristics Set pressure range (MPa) JIS Flow type 0.05 to 0.65 MPa 0. to 0.9 MPa to 0.5 MPa Flow type Thread type Nil Rc F G N NPT T NPTF Nil Pressure type Without sub-plate Rc / Rc /8 Rc /8 Rc / Rc / -9- F.R.L. AV AU AF AR IR VEX AMR ITV IC VBA VE VY G PPA AL

2 Courtesy of CMA/Flodyne/Hydradyne Motion Control Hydraulic Pneumatic Electrical Mechanical (800) Application Example Controlling pressure for die press cushion Electro-pneumatic proportional valve (Pressure control vlave) Power Regulator valve (VEX) Die cushion (Imagine air type shock absorber) Controlling welding pressure of welding machine electrode Power Electro-pneumatic proportional valve (Pressure control valve) Regulator valve (VEX) Pressurizing cylinder Electrode Controlling pressure of low pressure die-casting Low pressure die-casting -9- Check valve with feedback circuit Pressure sensor Cooler Release valve Control circuit Control circuit Control circuit Regulator valve VEX Controlling multispeed of cylinder Controlling rotation of air motor Electro-pneumatic proportional valve VEXP Surge absorber Electro-pneumatic proportional valve Flow type ( port) Number of rotations Feedback Air motor Tachometer P Previous Type VEF 0, Caution Power (Feedback circuit built-in type) Control circuit Control circuit Electro-pneumatic proportional valve (Flow type, port) VEA VE P E 0 must be used in conjunction with the power VEA. An old VEA cannot be used in combination with the current VE P E. How to Use DIN Terminal Caution Wiring procedure. Loosen the retaining screw and pull the connector from the pin plug.. Make 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.. Securely connect the wires to the specified terminals in accordance with the wiring procedure. Wiring Terminal block Connection is not used for terminal and. Coil has no polarity. Pin plug shape Applicable cable (Heavy-duty cable) 0.75 mm,.5 mm / core, core (O.D. ø6.8 to ø.5) based on JIS C and C Outlet changing procedure To change the wire outlet, first separate the terminal cover from the terminal block. Then, reinstall the terminal cover in the desired direction (in 90 increments). Be sure to read before handling. Refer to pages -- to -- for Safety Instructions and Common Precautions. Caution Precautions. Air supply Poor quality air could increase the spool s sliding resistance, while preventing it from attaining its specified characteristics. Use compressor oil with a minimal generation of oxidants and install a mist separator (SMC s AM series). Refer to page --.. 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 it.. Lubrication This product can be used without lubrication. But if lubricated, use turbin oil Class, ISO VG (with no additive). It is impossible to use spindle oil, machine oil, or grease.. Manual operation To 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. After checking the operation, reinstall the rubber cap in its original position.

3 Courtesy of CMA/Flodyne/Hydradyne Motion Control Hydraulic Pneumatic Electrical Mechanical (800) Diagram of Working Principle The spool controls the sleeve s opening through the balance between the proportional solenoid s pulling force (F) and the spring s reaction force (F). The spool moves in accordance with the amperage that is applied to the proportional solenoid, thus controlling the flow rate. Fully open Flow rate Closed Fully open port A R control F solenoid P A control P A control port Current F spring Controlled opening Sleeve Electro-pneumatic Proportional Valve Spool Flow Characteristics: Port Effective area (mm ) Flow Characteristics: Port Effective area (mm ) Effective area (mm ) Effective area (mm ) -9- F.R.L. AV AU AF AR IR VEX AMR ITV IC VBA VE VY G PPA AL

4 Courtesy of CMA/Flodyne/Hydradyne Motion Control Hydraulic Pneumatic Electrical Mechanical (800) Pressure Type: VEP Diagram of Working Principle The control opening becomes closed when the solenoid's pulling force (F) balances with the force (F), which is created by the outlet pressure (P) that passes through the feedback passage and acts on the spool surface. As a result, the outlet pressure (P) is established. F solenoid Controlled opening Sleeve (P = Inlet pressure) -9- Spool (P = Outlet pressure) Feedback passage Current-Pressure Characteristics The horizontal axis of the characteristics represents the output amperage of the power VEA5. (If NULL and GAIN are in the shipping condition, 0 to A can be viewed by substituting them with command signals 0 to 5 V.) JIS B 87 (In accordance Pressure Characteristics with air regulator) Inlet pressure P (MPa) Inlet pressure P (MPa) Set point Inlet pressure P (MPa) Set point Set point Flow Characteristics Inlet pressure:.0 MPa R A Flow rate (l/min (ANR)) P A Inlet pressure:.0 MPa R A Flow rate (l/min (ANR)) P A Inlet pressure: 0. MPa R A Flow rate (l/min (ANR)) P A

5 Courtesy of CMA/Flodyne/Hydradyne Motion Control Hydraulic Pneumatic Electrical Mechanical (800) Construction Flow type: VEF ( port) VEF ( port) Pressure type: VEP ( port) Flow type: VEF ( port) Component Parts No. Description Material Note q w e r t y u i o!0 Body Sub-plate Spool Sleeve Mold coil Solenoid cap assembly Movable core assembly End cover Bush Set bushing Special stainless steel Special stainless steel Resin Brass Metallic painted Metallic painted Metallic painted Electro-pneumatic Proportional Valve P() port R() port Flow type: VEF ( port) VEF ( port) Pressure type: VEP ( port) No. Description Material Gasket Spring Spring seat O-ring O-ring O-ring Hex. socket head cap screw Hex. socket head cap screw Hex. socket head cap screw Lock nut Stainless steel/piano wire Brass Chromium-molybdenum Chromium-molybdenum Chromium-molybdenum -9-5 F.R.L. AV AU AF AR IR VEX AMR ITV IC VBA VE VY G PPA AL

6 Courtesy of CMA/Flodyne/Hydradyne Motion Control Hydraulic Pneumatic Electrical Mechanical (800) Flow Type: VEF, Pressure Type: VEP Dimensions Flow type: VEF, VEF Pressure type: VEP Flow type: VEF -Rc /, /8, / A() port -ø7 mounting holes -9-6 P() port A() port -ø5.5 Mounting hole port: R port plug P() port R() port Cabtire cable O.D. ø6.8 to ø.5 Cabtire cable O.D. ø6.8 to ø.5 -Rc /, /8 Flow type: VEF, VEF Pressure type: VEP A() port -Rc /8, /, / P() port R() port Cabtire cable O.D. ø6.8 to ø.5 port: R port plug -ø9 Mounting hole