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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
534684
One-way flow control valve GR-QB-3/8-U
The Festo 534684 is an industrial component featuring a one-way flow control function with QB-3/8 pneumatic connections on both ports and manual actuation via a slotted screw. Constructed with a reinforced PBT housing and a nickel-plated brass screwed plug, this unit operates within a pressure range of -13.8 psi to 116 psi and supports compressed air media conforming to ISO 8573-1:2010 [7:4:4] with optional oil lubrication. It delivers a standard nominal flow rate of 51.2 cfm in the flow control direction and weighs 2.7 oz with flexible in-line or through-hole mounting positions. Submit the exact part number, quantity, and application requirements to request a quote.
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Request a QuoteWhy no listed price?
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
- 534684
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 534684.
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
- One-way ow control function
- Pneumatic connection 1
- QB-3/8
- Pneumatic connection 2
- QB-3/8
- Actuation type
- Manual
- Adjusting element
- Slotted screw
- Type of mounting
- Alternatively: | In-line installation | With through-hole
- Standard nominal ow rate in ow control direction
- 51.2 cfm
- Standard nominal ow rate in non-return direction
- 36.4 cfm...52.5 cfm
- Operating pressure
- -13.8 psi...116 psi
- Ambient temperature
- 0 °C...60 °C
- Housing material
- PBT-reinforced
- Mounting position
- Any
- Standard ow rate in ow control direction 6 -> 0 bar
- 85.3 cfm
- Standard ow rate in non-return direction at 6 -> 0 bar
- 92 cfm...97.9 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
- Product weight
- 2.7 oz
- Material of screwed plug
- Brass | Nickel-plated
- Note on materials
- RoHS compliant
- Seals material
- NBR
- Releasing ring material
- POM
- Knurled head material
- Brass
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 534684. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.