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 539994 is a modular industrial component featuring a 0.95 mm nominal size Laval nozzle, a 20 mm grid dimension, and an open silencer design that permits assembly in any position. It incorporates an electrical on-off valve, filter, open silencer, and vacuum switch with high vacuum and standard ejector characteristics, 40 µm filtration grade, and a piezoresistive measuring principle for relative pressure within a -29.5 to 0 inchHg backlit LCD indicating range. Additional specifications include short circuit strength, polarity protection for all electrical connections, IEC 61131-2 standard switching input, a closed valve function, and manual override via pushing or operating buttons. Please submit the exact part number, quantity, and application requirements to request a formal quote for this Festo 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 539994. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.