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 Size 4 industrial component from the MS series features a structural design consisting of a directly controlled piston regulator with an integrated pressure gauge and a rotary knob actuator lock with detent. Operating with compressed air as per ISO 8573-1:2010 [7:4:4] or inert gases, it provides a normal nominal flow rate of 1800 l/min across an operating pressure range of 1 bar to 10 bar and a pressure regulation range of 0.3 bar to 7 bar. This constant output pressure regulator includes secondary exhausting, a return flow characteristic, and displayable units in bar and psi, while supporting any mounting position and operation with oil lubrication. Submit the exact part number, quantity, and application requirements for an official 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 8099358. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.