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Coolant Valve, Air Operated / External Pilot Solenoid VNC Series (VNC304A-20A)

Coolant Valve, Air Operated / External Pilot Solenoid VNC Series VNC304A-20A

SMC

SMC

A coolant valve made by SMC.
[Features]
· Cylinder actuation by pilot air
· Wide selection of port sizes and variations
· Low water hammer
· Large valve capacity

(i)Caution

  • Product images may be representative images. Refer to the catalog for details.

PDF

Part Number

Configured Part Number is shown.

VNC304A-20A

External Pilot Type Solenoid Valve, Air Operated Type, Coolant Valve VNC Series Specifications

VNC Series external appearance 1

VNC Series external appearance 1

VNC Series external appearance 2

VNC Series external appearance 2

Fluid (Main Piping)Coolant *2
Fluid TemperatureVNC□□□A
VNC□1□B		*1: -5 to +60°C
VNC□0□B*1: -5 to +99℃
Ambient Temperature*1: -5 to +50°C (60°C for air-operated type)
Proof Pressure1.5 MPa
Operating Pressure RangeVNC□□1□0 to 0.5 MPa
VNC□□2□
VNC□□4□		0 to 1 MPa
External
Pilot
Air		PressureVNC□□1□
VNC□□4□		0.25 to 0.7 MPa
VNC□□2□0.1 + 0.25 × (operating pressure) to 0.7 MPa
*See table 1
LubricationNot required (if lubricating, use turbine oil class 1 ISO VG32)
Temperature*1: -5 to +50°C (60°C for air-operated type)
Mounting Orientation*3: Unrestricted

*1 No freezing.
*2: This product cannot be used for water.
*3: However, if the external pilot is a solenoid type, SMC recommends mounting the pilot solenoid valve in an upward facing vertical or horizontal orientation.

Table 1: VNC□□2□ pilot pressure (N.O. type)

Table 1: VNC□□2□ pilot pressure (N.O. type)

Model

ModelPiping Connection Port DiameterOrifice Diameter ø[mm]Flow Rate CharacteristicsWeight (kg)
ThreadFlange*KvConversion CvAir Operated TypeExternal Pilot Solenoid Type
VNC1□□□-6A1/8-71.11.20.20.3
VNC1□□□-8A1/4-1.11.3
VNC1□□□-10A3/8-1.31.5
VNC2□4□-10A113.43.90.50.7
VNC2□□□-10A154.35.0
VNC2□4□-15A1/2-113.94.5
VNC2□□□-15A155.05.8
VNC3□4□-20A3/4-146.17.00.81.0
VNC3□□□-20A209.311
VNC4□4□-25A1-167.99.11.21.4
VNC4□□□-25A2513.215
VNC5□4□-32A1 1/4-2214.3172.22.4
VNC5□□□-32A3220.023
VNC5□4□-32F-322214.3175.05.2
VNC5□□□-32F3220.023
VNC6□4□-40A1 1/2-2822.5263.63.8
VNC6□□□-40A4029.334
VNC6□4□-40F-402825.7306.87.0
VNC6□□□-40F4034.340
VNC7□4□-50A2-3335.4415.55.7
VNC7□□□-50A5053.662
VNC7□4□-50F-503335.74110.210.4
VNC7□□□-50F5057.166
VNC814□-65F-654542.449-15.7
VNC811□-65F6560.670
VNC914□-80F-805663.173-21.2
VNC911□-80F8086.5100

Product Dimensions

Thread

 

(Units: mm)

 

Piping connection: 6A, 8A, 10A dimensional drawing

Piping connection: 6A, 8A, 10A dimensional drawing

*9 mm longer for EZ, TZ and DZ.

  • VNC1□□□-6A: Main port 1, 2 / 1/8
  • VNC1□□□-8A: Main port 1, 2 / 1/4
  • VNC1□□□-10A: Main port 1, 2 / 3/8

 

(Units: mm)

 

Piping connection: 10A, 15A, 20A, 25A dimensional drawing

Piping connection: 10A, 15A, 20A, 25A dimensional drawing

 

(Units: mm)

 

ModelMain Port 1, 2ABCDEFHJ*KLMNPQRS
VNC2□□□-10A3/863422914.572.580.595.3162.5 (164.5)52264.524.32.3253455
VNC2□□□-15A1/263422914.572.580.595.3162.5 (164.5)52264.524.32.3253455
VNC3□□□-20A3/480503517.58492100.3174 (176)62315.528.32.3304360.5
VNC4□□□-25A190604020100108101.3190 (192)72366.533.32.3354973

*The dimensions in ( ) are for CE compliant products (-Q).

Product Diagram

N.C. (spring return normally closed type) diagram

N.C. (spring return normally closed type) diagram

When pilot solenoid valve 8 is not energized (or when air is exhausted from 12 (P1) port of the air operated type), valve 4 linked to piston 6 is closed via the action of the return spring 7.

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.

N.O. (spring return normally open type) diagram

N.O. (spring return normally open type) diagram

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.

NumberPart NameMaterialNotes
1Body AssemblyCast ironPlated
2Cover AssemblyAluminum alloyPlatinum silver coated
3Plate AssemblyIronSeal material (NBR, FKM)
4Valve ElementStainless steel-
5Valve CoverNBR, FKM32A to 50A use an O-ring
6Piston AssemblyAluminum alloy-
7Return SpringPiano wire-
8Spiral PinStainless steel-
9Pilot Solenoid Valve--

*Parts 3 and 5 are for selection of valve composition.

Precautions

  • *Use heat resistant parts for fittings and tubing when using high temperature fluids. (Compression fittings, fluorine resin tubes, copper piping, etc.)
  • *Be sure to read the individual product precautions before use.
  • *See the SMC catalog for product information other than the above.
30
45
60
  1. 1
Part Number
VNC304A-20A
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipType 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 Bracket Lead wire length
(mm) 		Functions CE compliant Lead wire electrical entry Manual operation type

MYR 1,262.95

1 Piece(s) 21 Day(s) Air Operating TypeNormally Closed[Rc (R)] Rc3/4Pilot Type-14-5～60Single Solenoid-NBRNoneNone-None-NoneNon-locking, push type

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  1. 1
 

Basic Information

Applicable Fluid Coolant Operating Environment Standard Application Single Item
Body material Cast iron

Please check the type/dimensions/specifications of the part VNC304A-20A in the Coolant Valve, Air Operated / External Pilot Solenoid VNC Series series.

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Specification/Dimensions

  • Tube Flange Nominal

    • 32
    • 40
    • 50
    • 65
    • 80

    Clear

  • Voltage

    • 12 V DC
    • 24 V DC
    • 100 V AC
    • 110 V AC
    • 200 V AC
    • 220 V AC

    Clear

  • Lead wire length(mm)

    • 200
    • 300

    Clear

  • CE compliant

    • CE-compliant product
    • Not compatible

    Clear

  • type

    • VNC
    • VNC□0□□
    • VNC□1□□

    Clear

  • Type

    • Electromagnetic Type
    • Air Operating Type

    Clear

  • Switching Type

    • Normally Closed
    • Normally Open

    Clear

  • Connection Type

    • Rc (R)
      • Rc
    • G
    • NPT
    • Tube Flange

    Clear

  • Plumbing Thread Nominal

    • 1/8
    • 1/4
    • 3/8
    • 1/2
    • 3/4
    • 1
    • 1 1/4
    • 1 1/2
    • 2

    Clear

  • Driving Type

    • Pilot Type

    Clear

  • Orifice Dia.(Ø)

    • 7
    • 11
    • 14
    • 15
    • 16
    • 20
    • 22
    • 25
    • 28
    • 32
    • 33
    • 40
    • 45
    • 50
    • 56
    • 65
    • 80

    Clear

  • Sealing materials

    • FKM
    • NBR

    Clear

  • Option

    • None
    • With light

    Clear

  • Bracket

    • Included
    • None

    Clear

  • Functions

    • CE compliant product
    • None

    Clear

  • 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
    • None

    Clear

  • Manual operation type

    • Locking type B (Tool required)
    • Non-locking, push type
    • Non-locking, push type A (projecting)

    Clear

  • CAD

    • 2D
    • 3D

    Clear

Days to Ship

    • All
    • 21 Day(s) or Less
    • 27 Day(s) or Less

    Clear

Specify Alterations

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VNC304B-20A
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipType 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 Bracket Lead wire length
(mm) 		Functions CE compliant Lead wire electrical entry Manual operation type

MYR 686.85

1 Piece(s) 21 Day(s) Air Operating TypeNormally Closed[Rc (R)] Rc1/4Pilot Type-7-5～60Single Solenoid-NBRNoneNone-None-NoneNon-locking, push type

MYR 729.27

1 Piece(s) 21 Day(s) Air Operating TypeNormally Closed[Rc (R)] Rc1/8Pilot Type-7-5～60Single Solenoid-FKMNoneNone-None-NoneNon-locking, push type

MYR 729.27

1 Piece(s) 21 Day(s) Air Operating TypeNormally Closed[Rc (R)] Rc1/4Pilot Type-7-5～60Single Solenoid-FKMNoneNone-None-NoneNon-locking, push type

MYR 1,326.50

1 Piece(s) 21 Day(s) Air Operating TypeNormally Closed[Rc (R)] Rc3/4Pilot Type-14-5～60Single Solenoid-NBRNoneIncluded-None-NoneNon-locking, push type

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1 Piece(s) Quote Air Operating TypeNormally ClosedG3/4--14-5～60--NBRNoneIncluded--Not compatibleNone-

MYR 1,347.70

1 Piece(s) 21 Day(s) Air Operating TypeNormally Closed[Rc (R)] Rc3/4Pilot Type-14-5～60Single Solenoid-FKMNoneNone-None-NoneNon-locking, push type

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