Datasheet

ManualsBrandsSMC ManualsAir Operated ValvesPneumatic 2/2-Way Process Valves G1/4 (DN8)

For controlling pneumatic systems or air-hydro circuits.

A balance poppet that enables air to flow forward or backward.

4.2-1

Series VNA

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

VNB

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 VNC

For controlling the high pressure cutting oils and coolants used in machine tools.

Maximum operating pressure: 3.5MPa, 7MPa

Series VNH

For steam control

PTFE seal adopted

With indicator (Option)

Series VND

For General Purpose

2/3 Port Valve

Process Valve/Series VN

The cylinder operation by external pilot air

Can be operated with pressure differential zero.

Wide variations

VN

VDW

Summary of content (10 pages)

PAGE 1
For General Purpose 2/3 Port Valve Process Valve/Series VN The cylinder operation by external pilot air Can be operated with pressure differential zero. Wide variations Series VNA For controlling pneumatic systems or air-hydro circuits. A balance poppet that enables air to flow forward or backward. Series VNB VX 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.
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Series VN Process Valve Process valve Series VNA zSeries Applicable fluid Valve Style Water Air Oil Low vacuum (1 Torr) Coolant Steam N.C. N.O. C.O. — — — — — — — — — — — — Process valve Series VNB N.C. — — N.O. — — C.O. — — Coolant valve Coolant valve Steam valve for high pressure Series VNC Series VND Series VNH N.C. N.O. N.C. N.C. N.O. — — — — — — — — — — — — — — — — — — — — — — — — 18 14 38 Port size 12 Rc(PT) 1 — — — 11 4 11 2 2 Page 4.2-2 34 P.4.2-3 to P.
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2 Port Valve for Flow Control Process Valve Series VNB Extensive applicable fluids The cylinder operated by Proper selection wilh body and sealing materials external pilot air permits application with a wide variety of fluids such as air, water, oil, gas and vaccum. Many variations The N.C, N.O, and C.O. types have made the screw-in styles (6A to 50A) and flanges (32F to 50F) into a series. Selection procedures Fluid Refer to Table q to check that the desired fluid is applicable.
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VNB How to Order Seal material Body option NBR seal A FPM seal B EPR seal C Refer to table q for application. Bracket — B None With bracket — V∗ S∗∗ L∗∗ ∗ Valve size: 2 to 7 ∗∗ Threaded port only Only valve size 1, 2, 3, 4 Air operated VNB 2 0 1 A 15A External pilot solenoid VNB 2 1 1 A 15A Standard Vaccum pilot Stainless steel body Aluminium body Q 1 D Manual override Valve size Valve style Orifice Symbol size (mm) 1 2 3 4 5 6 7 1 N.C. 0.
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VNB Model Port size Model Rc(PT) Flange(1) VNB1 -6A VNB1 -8A VNB1 -10A VNB2 4 -10A VNB2 -10A VNB2 4 -15A VNB2 -15A VNB3 4 -20A VNB3 -20A VNB4 4 -25A VNB4 -25A VNB5 4 -32A VNB5 -32A VNB6 4 -40A VNB6 -40A VNB7 4 -50A VNB7 -50A 18 14 — — 38 — 12 — 34 — 1 — 11 4 — 11 2 — 2 — Orifice size ø (mm) 7 11 15 11 15 14 20 16 25 22 32 28 40 33 50 Flow rate Effective area Nl/min (mm2) 687.05 981.50 1275.95 2453.75 3729.70 2944.50 4907.50 4907.50 7852.00 6870.
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VNB Flow Characteristics Air How to Read The Graph In the sonic flow region: For a flow of 6000 (l/min) VNB4 (Orifice ø25).....P1 ≅ 0.14MPa VNB4 (Orifice ø20).....P1 ≅ 0.28MPa VNB4 (Orifice ø15).....P1 ≅ 0.5MPa How to Calculate Flow qEquation in the domain of subsonic flow Calculation by Cv factor Q=4080·Cv· ∆P(P2+0.1013) 273 · G 273+θ ······ l /min (ANR) Calculation by effective area ∆P(P2+0.
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VNB Port size 6A, 8A,10A Standard VX VN VQ Model VNB1 -6A VNB1 -8A VNB1 -10A VDW MainPort Rc(PT) VC 18 14 ∗ DZ is 9mm longer 38 PA Precautions Be sure to read before handling. Refer to p.0-33 for Safety Instructions and p.0-37 to 0-40 for common precautions. External Pilot Vacuum Pilot Caution Caution When using the VNB 011 V N.C.
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VNB Port size 10A, 15A, 20A, 25A Standard ∗ DZ is 9 mm longer. Main port Rc(PT) Model Port size 34 1 D C B A 38 12 VNB2 V-10A VNB2 V-15A VNB3 V-20A VNB4 V-25A 63 42 28 80 90 50 60 35 40 14 E F I L M Q P N T S R 72.5 80.5 82.5 142.5 52 26 4.5 24.3 2.3 25 34 55 17.5 84 92 91.5 154 20 100 108 97.5 170 62 72 31 36 5.5 6.5 28.3 33.3 2.3 2.3 30 35 43 49 60.5 73 10A, 15A, 20A, 25A Vacuum pilot Model VNB2 V-10A VNB2 V-15A VNB3 V-20A VNB4 V-25A 4.
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VNB Port size 32A, 40A, 50A Standard/Vacuum pilot Model VNB5 -32A VNB6 -40A VNB7 -50A Main port Pilot port Rc(PT) 18 11 4 14 11 2 14 2 A B C D E F G J M 105 120 140 77 96 113 53 60 74 26.5 30 37 120.5 137 160 20 24 24 129.5 147 170 219.5 237 260 55 63 74 VX VN VQ VDW VC LV PA 4.
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VNB Construction Principles of Operation (The vacuum pilot style is excluded) Component Parts Description No. Body q w Cover assembly e Plate assembly r Valve element Piston assembly t Return spring y u Pilot solenoid valve Material Bronze∗ Aluminium alloy Brass∗ (NBR, FPM, EPR) Aluminium alloy Piano wire — Note Clear coated Platinum silver painted Valve material (NBR, FPM, EPR) Stainless steel or brass — — — Note) Parts e and r are for selection of valve composition.