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Products/Festo/564839
Festo 564839 One-way flow control valve GRLA-10-32-UNF-QB-1/8-U
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Festo

564839

One-way flow control valve GRLA-10-32-UNF-QB-1/8-U

This Festo industrial component, part number 564839, features an exhaust air flow control non-return function with a manual slotted screw adjusting element and a screw-in external thread mounting type. It provides a pneumatic connection 1 of QB-1/8 and pneumatic connection 2 of 10-32 UNF-2A, utilizing a nickel-plated brass screwed plug with a maximum tightening torque of 1.1 ft-lbf and a product weight of 0.3 oz. The unit operates within a temperature range of 32 °F to 140 °F and an operating pressure range of -13.8 psi to 116 psi using compressed air as per ISO 8573-1:2010 [7:4:4], supporting a standard nominal flow rate of 8.39 cfm in the flow control direction and 6.51 cfm to 8.57 cfm in the non-return direction. 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
564839
Data verification
Manufacturer evidence reviewed

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Exact part-number verificationTechnical properties are matched to 564839.
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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-1/8
Pneumatic connection 2
10-32 UNF-2A
Actuation type
Manual
Adjusting element
Slotted screw
Type of mounting
Screw-in | With external thread
Standard nominal ow rate in ow control direction
8.39 cfm
Standard nominal ow rate in non-return direction
6.51 cfm...8.57 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
14.8 cfm
Standard ow rate in non-return direction at 6 -> 0 bar
14.5 cfm...15.3 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
1.1 ft-lbf
Product weight
0.3 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

Confirm the exact configuration

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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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 564839. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.