Process Valve VNA Series 2 Port Valve For Compressed Air and Air-hydro Circuit Control Exclusively for air pressure system and air-hydro circuit control Universal 2 Port Valve [Option] Cylinder actuation 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., types are available. Threaded type from 6A to 50A is standardized. Compressed Air Air pressure circuit: Application examples Actuator stop valve Intermediate stop, inching VNA Actuator skip valve Terminal deceleration, intermediate deceleration, accelerative start VNA Actuator exhaust valve High speed operation, high speed exhaust VNA VNA Air motor driving valve VNA Air blow valve Line stop valve VNA Residual line pressure exhaust valve VNA VNA VNA Air-hydro Air pressure circuit: Application examples Air-hydro circuit: Application example Basic circuit VNA Conditions No load Piping length Bore size (mm) VNA111A, CCVSO2 3/8B (9 mm) VNA211A, CCVLO2 1/2B (13 mm) VNA311A 3/4B (19 mm) VNA411A 1B (25 mm) VNH VCC VNA VNA 2 VNA 1 VNA SGC VND 2 Refer to Air-hydro Unit pages in “Best Pneumatics No. 2-1 (CC series)” for further information on air-hydro. VNA VNB VNC 2 1 This series can supplement the capacity of current air-hydro valve units. They are suited to operate large bore cylinders as well as to simultaneously operate multiple cylinders and suspend their operation. Thus they can be used in the same way as the current airhydro units. Piping diameter 1 1m VNA SGH VNA 1 Load Combination of 2 or more valves of VNA series provides a skip valve function. Connect the skip valve to the A port side of a stop valve. 2 ISO VG32 Skip valve function 1 0.49 MPa Hydraulic fluid Caution Connect a speed controller (AS series etc.) to A port of VNA11 (in order to protect the speed control valve from surges when cylinder operation is suspended, thus improving stopping accuracy). VNA Supply pressure Caution When speed controller is mounted 2 Cylinder speed (mm/s) Operation Capacity When Used in Air-hydro Units VNA 1 TQ 2 559 Process Valve: 2 Port Valve For Compressed Air and Air-hydro Circuit Control VNA Series [Option] Note) CE-compliant: For D or DZ only How to Order Seal material A B C Thread type Nil F N T NBR seals FKM seals EPR seals Refer to “Table (1)” for availability. Bracket (Valve size: 1/2/3/4.) Rc G NPT NPTF Nil B Note) Air operated VNA 2 0 1 A 15A External pilot solenoid VNA 2 1 1 A 15A None With bracket Note) Only valve sizes 1, 2, 3 and 4. Shipped after assembled at our factory. Bracket part no. Valve size 1: VN1-A16 (with thread) Valve sizes 2 to 4: VN-16 2 to 4 1 T CE-compliant Nil Q — CE-compliant Note) CE-compliant: For D or DZ only Valve size Symbol Orifice dia. (mm) 1 ø10 2 Port size Valve type Symbol 1 N.C. 2 N.O. Port 3 Note) Symbol size Rc C.O. 6A 8A 10A 10A 15A 20A 25A 32A 40A 50A ø15 3 ø20 4 ø25 5 ø32 6 ø40 7 ø50 Note) Air operated only 18 14 38 38 12 34 1 11 4 11 2 2 Manual override Rated voltage 1 2 3 Note 2) 4 Note 2) 5 6 Note 2) 7 Note 2) 100 VAC 50/60 Hz 200 VAC 50/60 Hz 110 VAC 50/60 Hz 220 VAC 50/60 Hz 24 VDC 12 VDC 240 VAC 50/60 Hz Note 1) CE-compliant: For D or DZ only Note 2) Semi-standard Note 3) For other rated voltages, please consult with SMC. Nil: Non-locking push type A: Non-locking push type A (projecting) B: Slotted locking type B (tool required) Note) Nil: Non-locking push type Note) Valve size 1 to 4 Valve size 5 to 7 Note) Semi-standard Electrical entry/With light/surge voltage suppressor Symbol Table (1) Applicable Fluids Model VNAA VNAB VNAC (Valve material: NBR seal) (Valve material: FKM seal) (Valve material: EPR seal) Fluid Air (Standard, Dry) Argon Carbon dioxide (CO2) (Less than 0.7 MPa) Helium Carbon dioxide (CO2) Nitrogen gas (N2) (0.7 MPa or more) Turbine oil, Kinematic viscosity Turbine oil, Kinematic viscosity 40 to 100 mm /s Hydraulic fluid Hydraulic fluid 40 to 100 mm /s 2 2 Caution This product cannot be used for water application. 560 G GS E EZ T TZ D DZ Valve Valve size size 1 to 4 5 to 7 Grommet Grommet with surge voltage suppressor Grommet terminal Grommet terminal with light/surge voltage suppressor Conduit terminal Conduit terminal with light/surge voltage suppressor DIN terminal DIN terminal with light/surge voltage suppressor Electrical entry CE-compliant Symbol Electrical entry D DZ DIN terminal DIN terminal with light/surge voltage supressor Valve Valve size size 1 to 4 5 to 7 Process Valve: 2 Port Valve For Compressed Air and Air-hydro Circuit Control VNA Series Model Orifice diameter ø (mm) Port size Rc Model VNA1-6A VNA1-8A VNA1-10A VNA2-10A VNA2-15A VNA3-20A 1 8 1 4 10 3 8 15 1 2 3 4 20 Flow rate characteristics Measured by air Measured by water Note) Conversion C b Cv Kv 3 [dm /(bar·sec)] Cv 1.0 0.9 3.5 0.35 0.88 1.7 1.5 5.9 0.24 1.5 2.1 1.8 7.9 0.16 1.9 4.5 3.9 16 0.35 3.8 5.4 4.6 23 0.25 4.8 8.7 7.5 34 0.16 7.5 Weight (kg) Air operated External pilot solenoid 0.1 0.2 0.3 0.4 0.5 0.6 Note) This product cannot be used for water application. Model Port size Rc Orifice diameter ø (mm) VNA4-25A VNA5-32A VNA6-40A VNA7-50A 1 11 4 11 2 2 25 32 40 50 Flow rate characteristics Measured by air Measured by water Conversion Effective area Kv 2 Cv (mm ) 220 10.4 12 320 15.6 18 500 24.2 28 770 37.2 43 Weight (kg) Air operated External pilot solenoid 0.8 1.3 2.1 3.1 0.9 1.4 2.2 3.2 Specifications Fluid (Main piping) Refer to “Table (1)” on page 560. VNA A –5 to 60°C Note 1) VNA B –5 to 99°C Note 1) (Air operated type only) C Ambient temperature –5 to 50°C Note 1) (Air operated type: 60°C) Proof pressure 1.5 MPa Operating pressure range 0 to 1 MPa 0.2 to 0.7 MPa Pressure range External pilot air Lubrication Not required (Use turbine oil Class 1 ISO VG32, if lubricated. Note 2)) Temperature –5 to 50°C Note 1) (Air operated type: 60°C) Mounting orientation Unrestricted Note 3) Fluid temperature Note 1) No freezing Note 2) Lubrication is not allowed for use with EPR seal material. Note 3) For external pilot solenoid, it is recommended that the pilot solenoid valve be oriented either vertically upward or horizontally. External pilot solenoid Air operated Pilot Solenoid Valve Specifications Port size 6A to 25A 32A to 50A VO307-1 SF4--23 VO307-DDZ -Q SF4-DDZ -23-Q Grommet, Grommet terminal Electrical entry Conduit terminal Grommet, DIN terminal DIN terminal AC (50/60 Hz) 100 V, 200 V, Other voltage (Semi-standard) Coil rated voltage (V) DC 24 V, Other voltage (Semi-standard) Allowable voltage fluctuation –15% to +10% of rated voltage 50°C or less 35°C or less Temperature rise (When rated voltage is applied.) (When rated voltage is applied.) Inrush 5.6 VA (50 Hz), 5.0 VA (60 Hz) 12.7 VA (50 Hz), 10.7 VA (60 Hz) Apparent AC power Holding 3.4 VA (50 Hz), 2.3 VA (60 Hz) 7.6 VA (50 Hz), 5.4 VA (60 Hz) Power 1.8 W (without light), 4 W (without light), DC 2 W (with light) 4.2 W (with light) consumption Non-locking push type Manual override Non-locking push type Other (Semi-standard) Pilot solenoid valve Symbol Type Valve type N.C. N.O. C.O. Normally closed Normally open Double acting VNA01 VNA02 VNA03 12 (P1) Air operated 1 2 1 10 (P2) 12 (P1) 2 1 10 (P2) VNA11 12 (P1) 12 External pilot (P1) solenoid 1 VNA12 2 1 2 VNA VNB SGC SGH VNC VNH VND Note) For “How to Order” pilot solenoid valves, refer to page 565. 2 VCC TQ 561 A VNA Series Construction N.C. N.O. Port 12(P1) Port 10(P2) Port 2(B) ∗ C.O. type does not have a return spring u. Working Principle Port 1(A) VNA01, 11 (N.C.) When the pilot solenoid valve i is not energized (or when air is exhausted from the port 12(P1) of the air operated type), the valve element r linked to the piston t is closed by the return spring u. When valve element opens When the pilot solenoid valve is energized (or when pressurized air enters through the port 12(P1) of the air operated type), the pilot air that has entered under the piston moves upward to open the valve element. When valve element closes Component Parts No. 1 2 3 Note) Note) 4 5 6 7 8 Description Body Cover assembly Plate assembly Valve element Piston assembly Travel spring Return spring Pilot solenoid valve Material Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Aluminum alloy Stainless steel Piano wire — Note Platinum silver painted Platinum silver painted Seal material (NBR, FKM, EPR) Seal material (NBR, FKM, EPR) — — — — Note) Parts e and r are for selection of valve composition. Replacement Parts Description No. Seal material 3 Plate assembly 4 (Valve disc assembly for 25A-50A) 8 Pilot solenoid valve 562 Valve disc Seal material NBR FKM EPR NBR FKM EPR When the power to the pilot solenoid valve is turned off (or when fluid is exhausted from the port 12(P1) of the air operated type), the pilot air under the piston is exhausted, and the return spring closes the valve element. VNA02, 12 (N.C.) In contrast with the N.C., when the power to the pilot solenoid valve is turned off (or when air is exhausted from the port 10(P2) of the air operated type), the valve is held open by the return spring. When the pilot solenoid valve is energized (or when pressurized air enters through the port 10(P2) of the air operated type), the valve element closes. VNA03 (C.O.) The valve element of the C.O. type, which has no return spring, is in an arbitrary position when air is exhausted through the ports 12(P1) and 10(P2). When pressurized air enters the port 12(P1) (exhaust from the port 10(P2)), the valve element opens, and it closes when pressurized air enters the port 10(P2) (exhaust from the port 12(P1)). Part no. VNA1A VNA2 VNA3 VNA4 -6A, 8A, 10A -10A, 15A -20A -25A VN1-A3AA VN2-A3AA VN3-A3AA VN4-A3AA VN1-A3AB VN2-A3AB VN3-A3AB VN4-A3AB VN1-A3AC VN2-A3AC VN3-A3AC VN4-A3AC VN1-4AA VN2-4AA VN3-4AA VN4-A4AA VN1-4AB VN2-4AB VN3-4AB VN4-A4AB VN1-4AC VN2-4AC VN3-4AC VN4-A4AC SF4--23 (Refer to page 565 for details.) VNA5 VNA6 VNA7 -32A -40A -50A VN5-A3AA VN6-A3AA VN7-A3AA VN5-A3AB VN6-A3AB VN7-A3AB VN5-A3AC VN6-A3AC VN7-A3AC VN5-A4AA VN6-A4AA VN7-A4AA VN5-A4AB VN6-A4AB VN7-A4AB VN5-A4AC VN6-A4AC VN7-A4AC VO307-1 (Refer to page 565 for details.) Process Valve: 2 Port Valve For Compressed Air and Air-hydro Circuit Control VNA Series Port size: 6A, 8A, 10A Applicable cable O.D. ø6 to ø8 (D.T) Pilot port 12 (P1) 2 x Rc 1/8 (Back side 10 (P2)) 127 (Conduit terminal: T DIN terminal: D) 106.5 (Grommet terminal: E) 106.7 (Grommet: G) 63 (Air operated) Pg.9 Manual override (Non-locking push type) Main port 1(A) (Back side 2(B)) Port size: refer to table below 65 (Grommet terminal: E)∗ 70 (Conduit terminal: T)∗ 74.5 (DIN terminal: D)∗ 2 x ø4.5 Model VNA1-6A VNA1-8A VNA1-10A Bracket 2 x M4 x 0.7 depth 7 Main port 1(A), 2(B) 18 14 38 ∗ In the case of “EZ” or “TZ”, the length is longer by 10 mm. For “DZ”, the length is longer by 17 mm. VNA VNB SGC SGH VNC VNH VND VCC TQ 563 A VNA Series Port size: 10A, 15A, 20A, 25A 4 x øP J (Grommet: G) Pilot port 12 (P1) 2 x Rc 1/8 (Back side 10 (P2)) Pg.9 F (Air operated) Manual override (Non-locking push type) K (Grommet terminal: E) L (Conduit terminal: T DIN terminal: D) Applicable cable O.D. ø6 to ø8 (D.T) Main port (Back side 2 (B)) Port size: refer to table below G (Grommet terminal: E)∗ H (Conduit terminal: T)∗ ∗ In the case of “EZ” or “TZ”, the length is longer by 10 mm. For “DZ”, the length is longer by 17 mm. I (DIN terminal: D)∗ Model Main port 1(A), 2(B) A B C D 38 12 63 42 29 14 80 90 50 60 35 40 VNA2-10A VNA2-15A VNA3-20A VNA4-25A 34 1 G H M N R S T U 72.5 80.5 E F 75 80 84.5 124 125.5 144.5 52 I J K L 26 4.5 24.3 2.3 25 34 55 17.5 84 92 20 100 108 84 90 89 95 93.5 135.5 137 156 99.5 151.5 153 172 31 36 5.5 28.3 2.3 6.5 33.3 2.3 30 35 43 49 60.5 73 62 72 P Q Port size: 32A, 40A, 50A Applicable cable O.D. ø6 to ø8 (D, DL) Pg9 P2 E F Manual override (Non-locking push type) H (Grommet: G) G (Air operated) P1 I (DIN terminal: D, DZ) Pilot port 12 (P1), 10 (P2) Port size: refer to table below B D A C B Model VNA5-32A VNA6-40A VNA7-50A A 564 J A Main port 1 (A) (Back side 2 (B)) Port size: refer to table below Main port Pilot port 1(A), 2(B) 12(P1), 10(P2) 18 11 4 14 11 2 14 2 A B C D E F G 105 120 140 77 96 113 53 60 74 26.5 30 37 120.5 137 160 20 24 24 129.5 147 170 H I 170.1 211.5 187.6 229 210.6 252 J 55 63 74 Process Valve: 2 Port Valve For Compressed Air and Air-hydro Circuit Control How to Order Pilot Solenoid Valves Valve size 1/2/3/4 SF4 5 D 23 Valve size 5/6/7 Q VO307 CE-compliant Coil rated voltage Nil Q 1 100 VAC 50/60 Hz 2 200 VAC 50/60 Hz Note 1) 3 110 VAC 50/60 Hz 4 Note 1) 220 VAC 50/60 Hz 5 24 VDC 6 Note 1) 12 VDC Note 1) 7 240 VAC 50/60 Hz Note 1) Semi-standard Note 2) For other rated voltages, please consult with SMC. — CE-compliant Note) Electrical entry: D or DZ only Manual override Nil A∗ B∗ Non-locking push type Non-locking push type A (projecting) Slotted locking type B (tool required) ∗ Semi-standard Electrical entry/ With light/surge voltage suppressor CE-compliant G GS E EZ T TZ D DZ VNA Series Grommet Grommet with surge voltage suppressor Grommet terminal Grommet terminal with light/surge voltage suppressor Conduit terminal Conduit terminal with light/surge voltage suppressor DIN terminal DIN terminal with light/surge voltage suppressor — — — 5 D1 CE-compliant Coil rated voltage 1 2 3 Note 1) 4 Note 1) 5 6 Note 1) 7 Note 1) 100 VAC 50/60 Hz 200 VAC 50/60 Hz 110 VAC 50/60 Hz 220 VAC 50/60 Hz 24 VDC 12 VDC 240 VAC 50/60 Hz Note 1) Semi-standard Note 2) For other rated voltages, please consult with SMC. Q Nil Q — CE-compliant Note) Electrical entry: D or DZ only Electrical entry CEcompliant G Grommet Grommet with surge GS voltage suppressor DIN terminal D DIN terminal with light/ DZ surge voltage suppressor Accessory Function plate for VO307 (D seal, with screw): DXT152-14-5A — — — VNA VNB SGC SGH VNC VNH VND VCC TQ 565 A VNA Series Specific Product Precautions Be sure to read this before handling the products. Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid Valve for Fluid Control Precautions. Design Piping Warning Warning Extended periods of continuous energization If a valve is continuously energized for long periods, heat generation of the coil may result in reduced performance and shorter service life. This may also have an adverse effect on the peripheral equipment in proximity. Should a valve be continuously energized for long periods, or its daily energized state exceeds its non energized state, please use an energy saving type AC, energizing for long periods of time continuously, select the air-operated valve and use the continuous duty type of the VT307 for a pilot valve. Mounting When high temperature fluids are used, use fittings and tubing with heat resistant features. (Self-align fittings, PTFE tubing, Copper tubing, etc.) Mounting Direction of Pilot Solenoid Valve Warning With external pilot solenoids, the pilot solenoid valves are not splash proof specifications, and so care must be taken not to get fluid on oneself such as when performing maintenance. Caution Warning 1. Do not apply external force to the coil section. When tightening is performed, apply a wrench or other tool to the outside of the piping connection parts. Direction of mounting When replacing a valve, if an external pilot solenoid valve is mounted in the wrong direction, it may malfunction or leak air. 2. Do not warm the coil assembly with a heat insulator, etc. Use tape, heaters, etc., for freeze prevention on the piping and body only. They can cause the coil to burn out. 3. Avoid sources of vibration, or adjust the arm from the body to the minimum length so that resonance will not occur. Piping Caution 1. Applied voltage When electric power is connected to a solenoid valve, be careful to apply the proper voltage. Improper voltage may cause malfunction or coil damage. 2. Confirm the connections. After completing the wiring, confirm that the connections are correct. Warning 1. Piping Surge pressure is generated between the cylinder and the VNA during intermediate stoppage. To directly thread in the cylinder, use durable fittings (Stainless steel square nipples etc,) instead of ductile iron fittings (JIS B 2301) or steel pipe fittings (JIS B 2302). When VNA is installed away from the cylinder, use a high-pressure rubber hose (JIS B 6349) instead of steel pipe, when possible. 2. Air bleeding The VNA series valves have no air bleeding port. Bleed air comes from the middle piping. Bleeding by a vacuum pump is more effective. 3. Hydraulic fluid Turbine oil, Grade 1 ISO VG32, with petroleum hydraulic fluid is recommended. 4. Speed control valve The combination shown in the following table is recommended for best performance of the VNA series. (Piping: JIS K 6349 high pressure hose) External Pilot Caution Pilot port piping 12(P1) and 10(P2) piping should be as follows according to the model. Port VNA01 VNA02 VNA03 VNA1 12 12 (P1) External pilot Bleed port External pilot (∗) External pilot 10 (P2) Bleed port External pilot External pilot (∗) Pilot exhaust (∗) If the pilot air is not supplied, the valve position will not be held. Pressurize Port 12 (P1) or Port 10 (P2) when using the product. Installing a silencer to the exhaust port and the bleed port is recommended for noise reduction and for dust entry prevention. 566 Use with Air-hydro Unit Combination between the VNA series and Speed controller (AS series) VNA AS Piping (I.D.) 10A VNA111 AS420-03 3/8B (ø9.5) 15A VNA211 AS420-04 1/2B (ø12.7) 20A VNA311 AS500-06 3/4B (ø19.1) 25A VNA411 AS600-10 1B (ø25.4) 32A VNA511 AS800-12 1 1/4B (ø31.8) 40A VNA611 AS900-14 1 1/2B (ø38.1) 50A VNA711 AS900-20 2B (ø50.8) For details about speed control valve (AS series), refer to Best Pneumatics No. 7.
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