2/3 Port Valve Process Valve/Series VN íThe cylinder operation by external pilot air íCan be operated with pressure differential zero. íWide variations Series VNA For controlling pneumatic systems or air-hydro circuits. A balance poppet that enables air to flow forward or backward. Series VNB For controlling various fluids Can operate with a wide range of fluids, such as air, water, oil, gas, vacuum, etc., by selecting the body material and the seal material. Series VNC For controlling the cutting oils and coolants used in machine tools. Metal seals are used for preventing foreign matter such as cutting chips from entering. Maximum operating pressure: 0.5MPa, 1MPa Series VNH For controlling the high pressure cutting oils and coolants used in machine tools. Maximum operating pressure: 3.5MPa, 7MPa Series VND For steam control PTFE seal adopted With indicator (Option)

Process Valve Process valve Series VNA Applicable fluid Valve Style Water Air Oil Low vacuum (1 Torr) Coolant Steam Port size Coolant valve Coolant valve Steam valve for high pressure Series VNC Series VND Series VNH — — Process valve Series VNB

2 Port Valve for Comressed Air and Air-hydro Circuit Control Process Valve Series VNA Universal 2 Port Valve Exclusively for air pressure system and air-hydro circuit control The cylinder operation by external pilot air The balance poppet permits normal and reverse flow. Operation from 0 MPa is possible Wide variations N.C., N.O., C.O., are available. Screw-in styles, 6A to 50A, are standardized. Compressed Air Air pressure circuit: Application examples Actuator stop valve Emergency stop, intermediate stop, inching Actuator exhaust valve High speed operation, highspeed exhaust Actuator skip valve...

VNA How to Order Seal material A NBR seal B FPM seal C EPR seal Refer to Table q for application. External pilot solenoid Without bracket With bracket Only valve size 1, 2, 3, 4. Q Manual override Non-locking push style Valve size Symbol Port size Valve style Note) Only air operated type. Electrical entry/Indicator light and surge voltage suppressor D DL DIN connector DIN connector with indicator light and surge suppressor Table q Applicable fluids Model (Valve material: NBR seal) (Valve material: FPM seal) (Valve material: EPR seal) Air(standard dry) CO2 (0.7 MPa Max.) Applicable Nitrogen gas(N2)...

VNA Model Port Size Rc(PT) External pilot solenoid valve Air operated valve Refer to table q on page 4.2-4. –5 to 60°C (1) –5 to 99°C (1) VNAB/ C (Only air operated) Ambient temperature –5 to 50°C (Air operated: 60°C) (1) Proof pressure 1.5MPa Operating pressure range 0 to1MPa 0.2 to 0.7MPa Pressure range External pilot air Lubrication Not required (Use turbine oil No.1 (ISO VG32) if lubricated) (2) Temperature –5°C to 50°C(Air operated: 60°C) Fluid temperature Valve Specifications Fluid Weight (kg) Flow rate Orifice size Effective area ø (mm) Nl/min Air operated Solenoid (mm ) Note 2) Lubrication...

Flow Characteristics Flow rate Q (c/min(ANR)) In the sonic flow region: For a flow of 6000 (e/min) <Air and other gases> ©Equation in the domain of subsonic flow • Calculation by effective area ©Equation in the domain of sonic flow Calculation by effective area In case of a flow of oil 100 e/min: • Calculation by effective area Note) Calculation error of fluid with viscosity of 50 cSt or less will be very small. Q : Flow rate (Air and other gases e/min (ANR)) (Water and other liquids e/min) 8 : Temperature of air and other gases (°C) S : Effective area (mm2) S = 17667. Ne/min

Port size Main Port Applicable cabtire cable Pilot port

Applicable cabtire cable Pilot port Main port

Operation Principles Description Body Cover assembly Plate assembly Valve element Piston assembly Travel spring Return spring Pilot solenoid valve Material Note Aluminium alloy Platinum silver painted Aluminium alloy Platinum silver painted Aluminium alloy Valve material(NBR, FPM, EPR) Aluminium alloy Valve material(NBR, FPM, EPR) Aluminium alloy — Stainless steel — Piano wire — — — Note 1) Parts e, r are for selection of valve composition. VNA२01२, २11२ (N.C.) When the pilot solenoid valve ᕊ is not energized (or when air is exhausted from the P1 port of the air operated style),the valve element...

VNA How to Order Pilot Solenoid Valve Valve size 1, 2, 3, 4 Q Surge voltage suppressor Coil rated voltage Manual override/classification Non-locking push style Electrical entry/Indicator light and surge voltage suppressor. D DZ DIN connector DIN connector with indicator light and surge voltage suppressor — — None S — Surge voltage suppressor (Except for DL) Electrical entry Note 1) When the electrical entry is D, the pilot solenoid valve parts are as follows: Contact SMC for other voltages (9) DIN connector DIN connector with indicator light VO301-00D-X302 Indicator light and surge voltage suppressor...