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
Engineered with a 6 mm nominal width and a piston gate valve structural design featuring integrated pressure sensors, this Festo 550171 is a 5/3 proportional directional control valve, closed, with a hard sealing principle and direct type of control. It operates within a pressure range of 0 bar to 10 bar (0 MPa to 1 MPa) at a nominal operating pressure of 6 bar (87 psi) and delivers a normal nominal flow rate of 700 l/min utilizing a 24 V DC nominal operating voltage. The unit incorporates status indications via yellow, green, and red LEDs, a magnetic spring reset method, and a VPWP safety position that approaches the blocked mid-position during a control interface malfunction. Submit the exact part number, quantity, and application requirements to request a quote for this component.
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 550171. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.