534661

Name: Festo 534661 One-way flow control valve GRLA-1/4-QB-1/4-U
Brand: Festo

One-way flow control valve GRLA-1/4-QB-1/4-U

The Festo 534661 is an industrial component featuring an exhaust air flow control non-return function with manual actuation via a slotted screw. This screw-in unit utilizes a QB-1/4 pneumatic connection 1, a 1/4 NPT pneumatic connection 2, and a nickel-plated brass screwed plug requiring a maximum tightening torque of 8.9 ft-lbf. Operating on compressed air as per ISO 8573-1:2010 [7:4:4] within a temperature range of 32 °F to 140 °F, it delivers a standard nominal flow rate of 74.5 cfm in the flow control direction and 57.4 cfm to 75.9 cfm in the non-return direction. Submit the exact part number, quantity, and application requirements to receive a formal quote.

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Manufacturer: Festo
Part number: 534661
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Technical Specifications

Valve function: Exhaust air ow control non-return function
Pneumatic connection 1: QB-1/4
Pneumatic connection 2: 1/4 NPT
Actuation type: Manual
Adjusting element: Slotted screw
Type of mounting: Screw-in | With external thread
Standard nominal ow rate in ow control direction: 74.5 cfm
Standard nominal ow rate in non-return direction: 57.4 cfm...75.9 cfm
Ambient temperature: 32 °F...140 °F
Mounting position: Any
Operating pressure for entire temperature range: -13.8 psi...116 psi
Standard ow rate in ow control direction 6 -> 0 bar: 112 cfm
Standard ow rate in non-return direction at 6 -> 0 bar: 112 cfm...117 cfm
Operating medium: Compressed air as per ISO 8573-1:2010 [7:4:4]
Information on operating and pilot media: Operation with oil lubrication possible (required for further use)
LABS (PWIS) conformity: VDMA24364 Zone III
Temperature of medium: 32 °F...140 °F
Max. tightening torque: 8.9 ft-lbf
Product weight: 1.26 oz
Material of screwed plug: Brass | Nickel-plated
Note on materials: RoHS compliant
Seals material: NBR
Hollow bolt material: Brass | Nickel-plated
Releasing ring material: POM

Engineering context

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Our sourcing response is prepared against Festo 534661. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.