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Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
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Festo
534658
One-way flow control valve GRLA-1/8-QB-1/4-U
The Festo part number 534658 is an industrial component featuring an exhaust air flow control non-return function with manual actuation via a slotted screw. This unit has a QB-1/4 pneumatic connection 1 and an 1/8 NPT pneumatic connection 2, utilizing a screw-in mounting type with an external thread constructed from nickel-plated brass. It operates within an ambient and medium temperature range of 32 °F to 140 °F, supporting an operating pressure of -13.8 psi to 116 psi with compressed air as per ISO 8573-1:2010 [7:4:4]. Submit the exact part number, quantity, and application requirements for a quote.
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Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
- Manufacturer
- Festo
- Part number
- 534658
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 534658.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Valve function
- Exhaust air ow control non-return function
- Pneumatic connection 1
- QB-1/4
- Pneumatic connection 2
- 1/8 NPT
- Actuation type
- Manual
- Adjusting element
- Slotted screw
- Type of mounting
- Screw-in | With external thread
- Standard nominal ow rate in ow control direction
- 37.9 cfm
- Standard nominal ow rate in non-return direction
- 29.2 cfm...38.7 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
- 61.9 cfm
- Standard ow rate in non-return direction at 6 -> 0 bar
- 62 cfm...64.2 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
- 5.2 ft-lbf
- Product weight
- 0.7 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
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against Festo 534658. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.