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 537559 is an electrical 4/2 monostable industrial component featuring a 20 mm valve size, a 7 mm nominal size, and a piston slide design structure. It delivers a standard nominal flow rate of 800 l/min across a working pressure range of -0.9 to 8 bar utilizing external pilot air supply with a 2 to 8 bar pilot pressure and an air spring reset. Protected to IP65, this unit includes a detenting and pushing manual override, soft sealing principle, non-reversible flow direction, and a 110 V AC coil operating at 50/60 Hz with 3.1 VA pick-up and 2.2 VA holding power. 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 537559. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.