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 550509 is an MS-series size 6 industrial component featuring a structural design that integrates a soft-start valve, an on/off valve, and a filter regulator with a pressure gauge. It operates within a 4.5 bar to 10 bar operating pressure range, delivering a normal nominal flow rate of 3100 l/min at a 4 bar to 9 bar pressure regulation range with a 40 µm grade of filtration and fully automatic condensate drain. This unit utilizes 24 V DC 2.5 W coil characteristics, a plastic bowl guard, a rotary knob with detent actuator lock, and a controller function providing constant output pressure, primary pressure compensation, secondary exhausting, and return flow characteristic. Submit the exact part number, quantity, and application requirements to receive a formal quotation.
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 550509. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.