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 577538 is a 21 mm pneumatic industrial component featuring a 2x3/2 open/closed monostable valve function, a plate seat structural design, and direct control with an internal pilot air supply port. This device delivers a normal nominal flow rate of 600 l/min through 1/8 NPT pneumatic working ports, operating within a pressure range of -0.9 bar to 10 bar and supporting a pilot pressure of 1.5 bar to 10 bar. Incorporating a mechanical spring reset method, soft sealing principle, negative overlap lap, and adjustable exhaust air function, the unit achieves c UL us recognition and can be mounted in any position without a manual override. Submit the exact part number, quantity, and application requirements to receive a formal quotation 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 577538. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.