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 539998 is an industrial component featuring a modular structural design with a 1.4 mm nominal width Laval nozzle, a 20 mm width dimension, an open muffler construction type, and an any mounting position. It provides high vacuum and standard ejector characteristics, 40 µm filtration grade, non-detenting manual override that is also operable via control keys, and integrated functions including an electric on-off valve, filter, open muffler, and vacuum switch. Equipped with piezoresistive relative pressure measurement, short-circuit and reverse polarity protection for all electrical connections, and an IEC 61131-2 compliant switching input, the unit operates with NC/N.O. contact switching element functions and window or threshold value comparator switching functions, controlled through a 4-digit alphanumeric backlit LCD display ranging from -0.999 bar to 0 bar in bar units with a closed valve function. 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 539998. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.