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Festo
534662
One-way flow control valve GRLA-1/4-QB-5/16-U
This Festo industrial component, part number 534662, is an exhaust air flow control non-return valve featuring a QB-5/16 pneumatic connection 1, a 1/4 NPT pneumatic connection 2, a manual slotted screw adjusting element, and a nickel-plated brass screwed plug with a maximum tightening torque of 8.9 ft-lbf. The unit provides a standard nominal flow rate of 83.9 cfm in the flow control direction, a standard nominal flow rate ranging from 64.5 cfm to 85.7 cfm in the non-return direction, and operates within a pressure range of -13.8 psi to 116 psi at ambient and medium temperatures between 32 °F and 140 °F. Designed for screw-in mounting with an external thread in any mounting position, the 1.33 oz component utilizes compressed air per ISO 8573-1:2010 [7:4:4] with possible oil lubrication and conforms to VDMA24364 Zone III LABS (PWIS) standards. Submit the exact part number, quantity, and application requirements to request 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
- 534662
- Data verification
- Manufacturer evidence reviewed
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Exact part-number verificationTechnical properties are matched to 534662.
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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-5/16
- 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
- 83.9 cfm
- Standard nominal ow rate in non-return direction
- 64.5 cfm...85.7 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
- 141 cfm
- Standard ow rate in non-return direction at 6 -> 0 bar
- 141 cfm...146 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
- 1.33 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 534662. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.