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 557780 is an electrical, pilot-controlled diaphragm regulator featuring a 3-way proportional pressure control valve with a soft sealing principle and a nominal pressurization width of 5 mm alongside a 2.5 mm exhaust nominal width. Operating within a pressure regulation range of 0.1 bar to 10 bar (0.01 MPa to 1 MPa) and a normal nominal flow rate of 1250 l/min, this component requires a DC operating voltage from 21.6 V to 26.4 V and an inlet pressure of 6 bar to 11 bar (0.6 MPa to 1.1 MPa). It incorporates short-circuit and reverse polarity protection for all electrical connections, a mechanical spring reset method, a 3-digit LED indicator display, and maintains outlet pressure in an uncontrolled form if the supply cable breaks. Submit the exact part number, quantity, and application requirements to receive a formal 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 557780. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.