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Process Valve, 2 Port Valve For Flow Control VNB Series (VNB304A-20A)
A 2 port valve for flow control made by SMC.
[Features]
· Wide variety of applicable fluids
· Cylinder actuation by external pilot air
· Wide variations
(i)Caution
- Product images may be representative images. Refer to the catalog for details.
Part Number
Configured Part Number is shown.
VNB304A-20A
2 Port Valve For Flow Control, Process Valve, VNB Series Specifications
VNB Series external appearance
| Fluid (Main Piping) | Water, oil, air, vacuum, etc. | ||
|---|---|---|---|
| Fluid Temperature | VNB□□□A, VNB□1□B VNB□1□C | *1: -5 to +60°C | |
| VNB□0□B VNB□0□C | *1: -5 to +99℃ (Water, oil, etc. Air-operated type only) | ||
| Ambient Temperature | *1 -5 to +50°C (60°C for air-operated type) | ||
| Proof Pressure | 1.5 MPa | ||
| Operating Pressure *4 | VNB□□1□ | Low vacuum to 0.5 MPa | |
| VNB□□2□ VNB□□3□ VNB□□4□ | Low vacuum to 1 MPa | ||
| External Pilot Air | Pressure | VNB□□1□ VNB□□4□ | 0.25 to 0.7 MPa |
| VNB□□2□ VNB□□3□ | 0.1 + 0.25 × (operating pressure) to 0.25 + 0.25 × (operating pressure) MPa*3 | ||
| Lubrication | Not required (if lubricating, use turbine oil class 1 ISO VG32 *2) | ||
| Temperature | *1 -5 to +50°C (60°C for air-operated type) | ||
| Mounting Orientation | *5 Unrestricted | ||
*1: No freezing.
*2: Do not lubricate if seal material is EPR.
*3: For low vacuums, keep the pilot pressure in the 0.125 to 0.275‑MPa range.
*4: The pressure differential between port 1 (A) and 2 (B) must not exceed the maximum operating pressure.
*5: However, if the external pilot is a solenoid type, SMC recommends mounting the pilot solenoid valve in an upward facing vertical or horizontal orientation.
VNB□01/4 JIS symbol
VNB□02 JIS symbol
VNB□03 JIS symbol
VNB□11/4 JIS symbol
*When using in vacuums, ensure flow direction is from port 1 (A) to port 2 (B).
Model
| Model | Piping Connection Port Diameter (Threaded) | Orifice Diameter ø[mm] | Flow Rate Characteristics | Weight (kg) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Measured with Air | Measured with Water | ||||||||
| C [dm3/(bar·sec)] | b | Cv | Kv | Conversion Cv | Air Operated Type | External Pilot Solenoid Type | |||
| VNB1□□□-6A | 1/8 | 7 | 3.3 | 0.29 | 0.80 | 0.9 | 1.0 | 0.3 | 0.4 |
| VNB1□□□-8A | 1/4 | 4.6 | 0.17 | 1.0 | 1.0 | 1.2 | |||
| VNB1□□□-10A | 3/8 | 4.7 | 0.18 | 1.1 | 1.1 | 1.3 | |||
| VNB2□4□-10A | 11 | 9.6 | 0.40 | 2.6 | 2.5 | 2.9 | 0.6 | 0.7 | |
| VNB2□□□-10A | 15 | 17 | 0.32 | 4.0 | 3.9 | 4.5 | |||
| VNB2□4□-15A | 1/2 | 11 | 9.6 | 0.40 | 2.6 | 2.7 | 3.1 | ||
| VNB2□□□-15A | 15 | 19 | 0.24 | 4.8 | 5.0 | 5.8 | |||
| VNB3□4□-20A | 3/4 | 14 | 18 | 0.42 | 5.4 | 5.0 | 5.8 | 0.9 | 1.0 |
| VNB3□□□-20A | 20 | 35 | 0.13 | 7.4 | 9.6 | 11 | |||
| Model | Piping Connection Port Diameter | Orifice Diameter ø[mm] | Flow Rate Characteristics | Weight (kg) | ||||
|---|---|---|---|---|---|---|---|---|
| Thread | *Flange | Measured with Air | Measured with Water | |||||
| Effective Area (mm2) | Kv | Conversion Cv | Air Operated Type | External Pilot Solenoid Type | ||||
| VNB4□4□-25A | 1 | - | 16 | 130 | 6.1 | 7.0 | 1.4 | 1.5 |
| VNB4□□□-25A | 25 | 220 | 10.4 | 12 | ||||
| VNB5□4□-32A | 1 1/4 | - | 22 | 210 | 9.8 | 11 | 2.5 | 2.6 |
| VNB5□□□-32A | 32 | 320 | 15.6 | 18 | ||||
| VNB5□4□-32F | - | 32 | 22 | 210 | 9.8 | 11 | 5.7 | 5.8 |
| VNB5□□□-32F | 32 | 320 | 15.6 | 18 | ||||
| VNB6□4□-40A | 1 1/2 | - | 28 | 330 | 16.4 | 19 | 4.1 | 4.2 |
| VNB6□□□-40A | 40 | 500 | 24.2 | 28 | ||||
| VNB6□4□-40F | - | 40 | 28 | 330 | 16.4 | 19 | 7.7 | 7.8 |
| VNB6□□□-40F | 40 | 500 | 24.2 | 28 | ||||
| VNB7□4□-50A | 2 | - | 33 | 520 | 25.1 | 29 | 6.3 | 6.4 |
| VNB7□□□-50A | 50 | 770 | 37.2 | 43 | ||||
| VNB7□4□-50F | - | 50 | 33 | 520 | 25.1 | 29 | 11.4 | 11.5 |
| VNB7□□□-50F | 50 | 770 | 37.2 | 43 | ||||
*The accompanying flange should be JIS B 2210 10K (ordinary) or its equivalent.
Pilot Solenoid Valve Specifications
| Piping Connection Port Diameter | 6 A to 25 A | 32 A to 50 A | ||
|---|---|---|---|---|
| Pilot Solenoid Valve*1 | SF4-□□□-23 SF4-□D-23-Q SF4-□DZ-23-Q | SF4-□□□1 SF4-□D1-Q SF4-□DZ1-Q | ||
| Electrical Entry | Grommet, grommet terminal Conduit terminal DIN Terminal | Grommet, DIN terminal | ||
| Coil Rated Voltage (V) | AC (50/60 Hz) | 100 V, 200 V, other (semi-standard) | ||
| DC | 24 V, other (semi-standard) | |||
| Allowable Voltage Fluctuation | -15 to +10% of rated voltage | |||
| Temperature rise value | 35°C or less (when rated voltage is applied) | 50℃ or less (when rated voltage is applied) | ||
| Apparent Power | AC | Inrush | 5.6 VA (50 Hz), 5.0 VA (60 Hz) | 12.7 VA (50 Hz), 10.7 VA (60 Hz) |
| Holding | 3.4 VA (50 Hz), 2.3 VA (60 Hz) | 7.6 VA (50 Hz), 5.4 VA (60 Hz) | ||
| Power Consumption | DC | 1.8 W (without indicator light), 2 W (with indicator light) | 4 W (without indicator light), 4.2 W (with indicator light) | |
| Manual Operation | Non-locking push type Other (semi-standard) | Non-locking push type | ||
*1 See catalog for information on ordering pilot solenoid valves.
*2 The vacuum pilot type pilot solenoid valve is VO307V-□□□1.
*3 The vacuum pilot-operated CE compliant pilot solenoid valve is VO307V-□D/DZ1-Q.
Diagram
VNB Series (N.C. type) diagram
VNB Series (N.O. type) diagram
*The C.O. type structure does not include return spring 6.
Component Parts
| Number | Part Name | Material | Notes |
|---|---|---|---|
| 1 | Body | *2 Bronze | Clear coating |
| 2 | Cover Assembly | Aluminum alloy | Platinum silver coated |
| 3*1 | Plate Assembly | Brass*2 | Seal material (NBR, FKM, EPR) |
| *1: 4 | Valve Element | Stainless steel or brass *2 | Seal materials (NBR, FKM, EPR) |
| 5 | Piston Assembly | Aluminum alloy | - |
| 6 | Return Spring | Piano wire | - |
| 7 | Pilot Solenoid Valve | - | - |
*1 Parts 3 and 4 are for selection of valve composition.
*2 Body option S is stainless steel; L is aluminum.
Operating Principles (except Vacuum Pilot Type)
For VNB□01/4□, □11/4□ (N.C. Type)
- When pilot solenoid valve 7 is not energized (or when air is exhausted from 12 (P1) port of the air operated type), valve 4 linked to piston 5 is closed via the action of the return spring 6.
For Opening the Valve
- When the pilot solenoid valve is energized (or when pressurized air enters through port 12 (P1) of the air operated type), the pilot air that has entered under the piston moves upward, opening the valve.
For Closing the Valve
- When the power to the pilot solenoid valve is cut (or when fluid is exhausted from port 12 (P1) of the air operated type), the pilot air under the piston is exhausted and the valve closed via the action of the return spring.
For VNB□02□, □12□ (N.O. Type)
- In contrast for the N.C. type, when the power to the pilot solenoid valve is shut off (or when air is exhausted from port 10 (P2) of the air operated type), unenergized, the valve is held open via the return spring. When the pilot solenoid valve is energized (or when pressurized air enters through port 10 (P2) of the air operated type), the valve closes.
VNB□03□ (C.O. Type)
- The valve of the C.O. type, which has no return spring, is in an arbitrary position when air is exhausted through ports 12 (P1) and 10 (P2). When pressurized air enters port 12 (P1) (exhaust from port 10 [P2]), the valve opens. The valve closes when pressurized air enters port 10 (P2) (exhaust from port 12 [P1]).
Drawing
(Units: mm)
Standard type (piping connection port diameter: 6A, 8A, 10A) dimensional drawing
*10 mm longer for EZ and TZ, and 17 mm longer for DZ.
- VNB1□□□-6A main port 1 (A), 2 (B): 1/8
- VNB1□□□-8A main port 1 (A), 2 (B): 1/8
- VNB1□□□-10A main port 1 (A), 2 (B): 1/8
(Units: mm)
Standard type (piping connection port diameter: 10A, 15A, 20A, 25A) dimensional drawing
*10 mm longer for EZ and TZ, and 17 mm longer for DZ.
(Units: mm)
| Model | Main Port 1 (A), 2 (B) | A | B | C | D | E | F | G | H | I | J | K | L | M | N | P | Q | R | S | T | U |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VNB2□□□-10A | 3/8 | 63 | 42 | 28 | 14 | 72.5 | 80.5 | 75 | 80 | 84.5 | 124 | 125.5 | 144.5 | 52 | 26 | 4.5 | 24.3 | 2.3 | 25 | 34 | 55 |
| VNB2□□□-15A | 1/2 | ||||||||||||||||||||
| VNB3□□□-20A | 3/4 | 80 | 50 | 35 | 17.5 | 84 | 92 | 84 | 89 | 93.5 | 135.5 | 137 | 156 | 62 | 31 | 5.5 | 28.3 | 2.3 | 30 | 43 | 60.5 |
| VNB4□□□-25A | 1 | 90 | 60 | 44 | 22 | 100 | 108 | 90 | 95 | 99.5 | 151.5 | 153 | 172 | 72 | 36 | 6.5 | 33.3 | 2.3 | 35 | 49 | 73 |
(Units: mm)
Vacuum pilot type (piping connection port diameter: 10A, 15A, 20A, 25A) dimensional drawing
(Units: mm)
| Model | Main Port 1 (A), 2 (B) | A | B | C | D | E | F | G | H | I | J | K | L | M | N | P | Q | R | S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VNB2□□□V-10A | 3/8 | 63 | 42 | 28 | 14 | 72.5 | 80.5 | 72.2 | 95.3 | 121.1 | 162.5 | 52 | 26 | 4.5 | 24.3 | 2.3 | 25 | 34 | 55 |
| VNB2□□□V-15A | 1/2 | ||||||||||||||||||
| VNB3□□□V-20A | 3/4 | 80 | 50 | 35 | 17.5 | 84 | 92 | 77.2 | 100.3 | 132.6 | 174 | 62 | 31 | 5.5 | 28.3 | 2.3 | 30 | 43 | 60.5 |
| VNB4□□□V-25A | 1 | 90 | 60 | 44 | 22 | 100 | 108 | 78.2 | 101.3 | 148.6 | 190 | 72 | 36 | 6.5 | 33.3 | 2.3 | 35 | 49 | 73 |
*See the SMC catalog for information other than that detailed above.
| Part Number |
|---|
| VNB304A-20A |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Type | Switching Type | Connection Type | Plumbing Thread Nominal | Driving Type | Tube Flange Nominal | Orifice Dia. (Ø) | Operating Temperature Range (°C) | Number of Solenoids | Voltage | Sealing materials | Option | Body material | Bracket | Lead wire length (mm) | Functions | CE compliant | Lead wire electrical entry | Manual operation type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MYR 893.02 | 1 Piece(s) | 21 Day(s) | Air Operating Type | Normally Closed | [Rc (R)] Rc | 3/4 | Pilot Type | - | 14 | -5～60 | - | - | NBR | Standard type | Bronze | None | - | None | - | None | Non-locking, push type |
Loading...
Basic Information
| Applicable Fluid | Air / Water / Vacuum / Oil / Gas | Operating Environment | Standard | Application | Single Item |
|---|
Please check the type/dimensions/specifications of the part VNB304A-20A in the Process Valve, 2 Port Valve For Flow Control VNB Series series.
Specification/Dimensions
-
Tube Flange Nominal
-
Voltage
- 12 V DC
- 24 V DC
- 100 V AC 50/60 Hz
- 110 V AC 50/60 Hz
- 200 V AC 50/60 Hz
- 220 V AC 50/60 Hz
- 240 V AC 50/60Hz
- 240 V AC 50/60 Hz
-
Lead wire length(mm)
- 200
- 300
-
CE compliant
- CE-compliant product
- Not compatible
-
type
- VNB□0
- VNB□1
-
Type
- Electromagnetic Type
- Air Operating Type
-
Switching Type
- Normally Closed
- Normally Open
- Others
-
Connection Type
- Rc (R)
- G
- NPT
- NPTF
- Tube Flange
- Rc (R)
-
Plumbing Thread Nominal
-
Driving Type
- Pilot Type
-
Orifice Dia.(Ø)
-
Sealing materials
- EPR
- FKM
- NBR
-
Option
- Standard type
- Vacuum pilot type
-
Body material
- Aluminum
- Bronze
- Stainless steel
-
Bracket
- Included
- None
-
Functions
-
Lead wire electrical entry
- Conduit terminal
- Conduit terminal with light and surge voltage suppressor
- DIN terminal
- DIN terminal with light and surge voltage suppressor
- Grommet
- Grommet terminal with light and surge voltage suppressor
- Grommet with surge voltage suppressor
- None
-
Manual operation type
- Locking type B (tool required)
- Non-locking, push type
- Non-locking, push type A (projecting)
-
CAD
- 2D
- 3D
Days to Ship
-
- All
- 21 Day(s) or Less
- 27 Day(s) or Less
- 31 Day(s) or Less
- 32 Day(s) or Less
- 42 Day(s) or Less
Specify Alterations
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
Products like this...
| Part Number |
|---|
| VNB102A-8A |
| VNB102A-N8A-B |
| VNB102AL-8A |
| VNB304A-20A-B |
| VNB304A-N20A |
| VNB304A-N20A-B |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Type | Switching Type | Connection Type | Plumbing Thread Nominal | Driving Type | Tube Flange Nominal | Orifice Dia. (Ø) | Operating Temperature Range (°C) | Number of Solenoids | Voltage | Sealing materials | Option | Body material | Bracket | Lead wire length (mm) | Functions | CE compliant | Lead wire electrical entry | Manual operation type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MYR 465.27 | 1 Piece(s) | 21 Day(s) | Air Operating Type | Normally Open | [Rc (R)] Rc | 1/4 | Pilot Type | - | 7 | -5～60 | - | - | NBR | Standard type | Bronze | None | - | None | - | None | Non-locking, push type | ||
MYR 486.02 | 1 Piece(s) | 21 Day(s) | Air Operating Type | Normally Open | NPT | 1/4 | Pilot Type | - | 7 | -5～60 | - | - | NBR | Standard type | Bronze | Included | - | None | - | None | Locking type B (tool required) | ||
- | 1 Piece(s) | Quote | Air Operating Type | Normally Open | [Rc (R)] Rc | 1/4 | - | - | - | -5～60 | - | - | NBR | Standard type | - | None | - | - | Not compatible | None | - | ||
MYR 956.58 | 1 Piece(s) | 21 Day(s) | Air Operating Type | Normally Closed | [Rc (R)] Rc | 3/4 | Pilot Type | - | 14 | -5～60 | - | - | NBR | Standard type | Bronze | Included | - | None | - | None | Locking type B (tool required) | ||
MYR 893.02 | 1 Piece(s) | 21 Day(s) | Air Operating Type | Normally Closed | NPT | 3/4 | Pilot Type | - | 14 | -5～60 | - | - | NBR | Standard type | Bronze | None | - | None | - | None | Non-locking, push type | ||
- | 1 Piece(s) | Quote | Air Operating Type | Normally Closed | NPT | 3/4 | - | - | 14 | -5～60 | - | - | NBR | Standard type | Bronze | Included | - | - | Not compatible | None | - |
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