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 540028 is a modular industrial component featuring a 1.4 mm nominal width Laval nozzle, a 20 mm width dimension, an open muffler construction type, and an any mounting position with high vacuum and standard ejector characteristics. This unit integrates an electric ejector pulse valve, flow control valve, electric on-off valve, filter, check valve, open muffler, and a vacuum switch, along with a piezoresistive relative pressure measuring principle utilizing a 40 µm grade of filtration. Electrical features include short-circuit protection, reverse polarity protection across all electrical connections, a non-detenting manual override, an N.O. contact switching element function, threshold value comparator and fixed hysteresis switching functions, LED display and switching position indication, teach-in setting options, and an IEC 61131-2 standard switching input. Submit the exact part number, quantity, and application requirements to request a formal quote 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 540028. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.