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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
165661
One-way flow control valve GRLA-3/4-B-CT
The Festo 165661 is an industrial component featuring a one-way flow control function for exhaust air with a G3/4 pneumatic connection port and a slotted head screw adjusting element for threaded mounting. Constructed with a wrought aluminum alloy screw-in stud and regulating screw alongside NBR seals, it operates within a working pressure range of 0.3 to 10 bar and ambient temperatures from -10 to 60 °C using filtered compressed air with a 40 µm filtration. This part delivers a standard nominal flow rate in the flow control direction of 4,320 l/min, a non-return standard nominal flow rate of 3,220 to 4,320 l/min, and holds Germanischer Lloyd authorization while remaining free of copper and PTFE. 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
- 165661
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 165661.
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 flow control function for exhaust air
- Pneumatic connection, port
- 2 G3/4
- Adjusting element
- Slotted head screw
- Mounting type
- Threaded
- Standard nominal flow rate in flow control direction
- 4,320 l/min
- Standard nominal flow rate in non-return direction
- 3,220 ... 4,320 l/min
- Working pressure
- 0.3 ... 10 bar
- Ambient temperature
- -10 ... 60 °C
- Operating medium
- Filtered, unlubricated compressed air, 40 µm filtration | Filtered, lubricated compressed air, 40 µm filtration
- Authorization
- Germanischer Lloyd
- Assembly position
- Any
- Standard flow rate in direction of flow control: 6 -> 0 bar
- 7,300 l/min
- Standard flow rate in blocked direction: 6 -> 0 bar
- 5,440 ... 7,300 l/min
- Medium temperature
- -10 ... 60 °C
- Max. tightening torque
- 60 Nm
- Product weight
- 377 g
- Materials information for screw-in stud
- Wrought Aluminum alloy
- Materials note
- Free of copper and PTFE
- Materials information for seals
- NBR
- Regulating screw material data
- Wrought Aluminum alloy
- Swivel joint material data
- Zinc die-casting
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 165661. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.