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 8191403 is a directly controlled 3-way proportional pressure control valve closed featuring a non-reversible flow direction and a mechanical spring reset method. Measuring 18 mm wide with overall dimensions of 18 mm by 60.5 mm by 85 mm, this electrical component incorporates QS-4 pneumatic connections for ports 1, 2, and 3, along with EPDM, HNBR, and NBR sealing materials utilizing a soft sealing principle. It operates within an ambient and medium temperature range of 0 °C to 50 °C and 5 °C to 50 °C respectively, supports an inlet pressure of 0 MPa to 0.2 MPa, and maintains a total leakage of 1 l/h. Submit the exact part number, quantity, and application requirements to request 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 8191403. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.