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 size 4 industrial component features a 40 mm width dimension and an electrically actuated poppet valve structural design with a 3/2-way, closed, monostable valve function. This piloted unit operates with an internal pilot air supply port, mechanical spring reset method, and a non-detenting or detenting manual override, incorporating an exhaust air function that cannot be throttled. It delivers a standard flow rate exhaust of 1600 l/min at a b-value of 0.45 and a C value of 8.52 l/sbar, operating within a pressure range of 0.3 MPa to 0.7 MPa (3 bar to 7 bar). Additional features include an integrated pressure sensor with an LCD display, a muffler, and any mounting position flexibility. Submit the exact part number, quantity, and application requirements for an RFQ 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 8201356. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.