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 8042551 is a 10 mm electrical industrial component featuring a 5/2-way monostable valve function and a piston slide structural design with a soft sealing principle. Operating at 24V DC within a pressure range of 0.25 MPa to 0.7 MPa (2.5 bar to 7 bar), this c UL us-recognized unit delivers a normal nominal flow rate of 340 l/min through M7 pneumatic working ports. It incorporates an internal pilot air supply, adjustable exhaust air function, positive overlap lap, and features both detenting and non-detenting manual override capabilities with IP65 degree of protection. Submit the exact part number, quantity, and application requirements for 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 8042551. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.