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 3929540 is a digital, electropneumatic positioner featuring a double-acting mode of operation and a safety position with pneumatic outlets closed. It operates within a pressure range of 0.3 MPa to 0.8 MPa (3 bar to 8 bar, 43.5 psi to 116 psi) utilizing compressed air according to ISO 8573-1:2010 [7:4:4] with a normal nominal flow rate of 130 l/min, and is powered by a 24 V DC nominal operating voltage with a 21.6 V to 26.4 V range. This component includes a backlit LCD 7-segment display, an integrated linear potentiometer measuring principle, G1/8 pneumatic connections, and analog input signal ranges of 0-10 V, 0-20 mA, and 4-20 mA. Submit the exact part number, quantity, and application requirements to receive a 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 3929540. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.