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Check valve, VFOF Series

Check valve, VFOF Series

FESTO

FESTO

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Part Number

Configured Part Number is shown.

Check valve, VFOF Series

Check valve, VFOF Series

Features

Check valve, VFOF Series

Specifications

Valve functionExhaust air one-way
 flow control function
Pneumatic connection 2G 1/8G 1/4
Pneumatic connection 1QS-6QS-8
Pilot air connection 21QS-6QS-8
Adjusting elementInternal hex
Actuation typeManual
Type of actuation, piloted non-return functionPneumatic
Manual exhaust functionNon-detenting
Type of mountingScrew-in
Mounting positionAny
Switching timeOff [ms]911
On [ms]68
Nominal tightening torque [Nm]3 ±20%11 ±20%
Perm. actuation torque for regulating screw [Nm] 1
Rotatability [°]360 (continuous rotation not permitted) 

Operating and environmental conditions

Operating pressure [bar]0.2 to 10
Pilot pressure [bar]2 to 10
Operating/pilot mediumCompressed air according to ISO 85731:2010 [7:4:4]
Note on operating/pilot mediumLubricated operation possible (in which case lubricated operation will always be required)
Ambient temperature [℃]-10 to +60
Temperature of medium [℃]-10 to +60
Storage temperature [℃]-20 to +70
Corrosion resistance class CRC2
30
45
60
  1. 1
Part Number
VFOF-LE-BAH-G14-Q8
VFOF-LE-BAH-G18-Q6
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipPneumatic connection 1 Pneumatic connection 2 Pilot air port 21 Standard nominal flow rate in flow control direction
(l/min) 		Standard nominal flow rate in non-return direction
(l/min) 		Standard flow rate in flow control direction 6 -> 0 bar
(l/min) 		Standard flow rate in non-return direction at 6 -> 0 bar
(l/min) 		Nominal tightening torque
(Nm) 		Manufacturer part # Weight
(g)

SGD 177.95

1 Piece(s) Quote QS-8G1/4QS-8590310-540940830-100011192703073.9

SGD 154.80

1 Piece(s) Quote QS-6G1/8QS-6240120-220420400-4603800145928.6
Part Number
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipPneumatic connection 1 Pneumatic connection 2 Pilot air port 21 Standard nominal flow rate in flow control direction
(l/min) 		Standard nominal flow rate in non-return direction
(l/min) 		Standard flow rate in flow control direction 6 -> 0 bar
(l/min) 		Standard flow rate in non-return direction at 6 -> 0 bar
(l/min) 		Nominal tightening torque
(Nm) 		Manufacturer part # Weight
(g)

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  1. 1
Download (PDF)
Catalog (2 page view)
 

Basic Information

Housing material PBT Seals material NBR Material of screws Brass
Hollow bolt material Wrought aluminum alloy Adjusting element Internal hexagon Min. Operating pressure(bar) 0.2
Max. Operating pressure(bar) 10 Min. Pilot pressure(bar) 2 Max. Pilot pressure(bar) 10
Min. Ambient temperature(°C) -10 Max. Ambient temperature(°C) 60 Min. Temperature of medium(°C) -10
Max. Temperature of medium(°C) 60 Operating medium Compressed air as per ISO 8573-1:2010 [7:4:4] Pilot medium Compressed air as per ISO 8573-1:2010 [7:4:4]

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Specification/Dimensions

  • Pneumatic connection 1

    • QS-8
    • QS-6

    Clear

  • Pneumatic connection 2

    • G1/4
    • G1/8

    Clear

  • Pilot air port 21

    • QS-8
    • QS-6

    Clear

  • Standard nominal flow rate in flow control direction(l/min)

    • 240
    • 590

    Clear

  • Standard nominal flow rate in non-return direction(l/min)

    • 120-220
    • 310-540

    Clear

  • Standard flow rate in flow control direction 6 -> 0 bar(l/min)

    • 420
    • 940

    Clear

  • Standard flow rate in non-return direction at 6 -> 0 bar(l/min)

    • 400-460
    • 830-1000

    Clear

  • Nominal tightening torque(Nm)

    • 3
    • 11

    Clear

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