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 540004 is a modular industrial component featuring an open muffler construction type, a 20 mm width dimension, and a 0.95 mm nominal width Laval nozzle with high vacuum and standard ejector characteristics. Equipped with an integrated ejector pulse valve, flow control valve, electric on-off valve, filter, electric air-saving function, check valve, open muffler, and a vacuum switch, this unit supports any mounting position and includes a piezoresistive relative pressure measuring principle with a -0.999 bar to 0 bar display range on a backlit 4-digit alphanumeric LCD. Electrical attributes include short-circuit protection, reverse polarity protection for all connections, a switching input conforming to IEC 61131-2, non-detenting manual override with control key capability, and NC or NO switching element functions supporting window and threshold value comparators. 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 540004. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.