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.

Festo
The Festo part number 8177446 is a 2/2-way, closed, monostable industrial component featuring a pneumatic actuation type and G1/2 pneumatic connections for both ports 1 and 2. This welding spatter-resistant device includes an exhaust air one-way flow control function, manual exhaust, and a detenting manual override, operating within a pressure range of 0.05 MPa to 1 MPa (0.5 bar to 10 bar) and an ambient temperature range of -5 °C to 60 °C. It provides a standardized nominal flow rate of 860 l/min in the flow control direction and 1140 l/min to 1240 l/min in the non-return direction, utilizing compressed air as per ISO 8573-1:2010 [7:4:4] with screw-in external thread mounting in any position. Submit the exact part number, quantity, and application requirements for a formal quote.
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.
For a faster response, include quantity, condition, and delivery destination.
Verified configuration
Engineering context
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.
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Our sourcing response is prepared against Festo 8177446. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.