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 8203866 is an industrial component featuring a Size 9 MS series structural design configured as a pilot-controlled piston control valve with constant output pressure, primary pressure compensation, and secondary exhausting functions. Operating within a 6 bar to 11 bar range, it delivers a 0.1 bar to 10 bar pressure regulation range with a maximum pressure hysteresis of 0.05 bar using compressed air as per ISO 8573-1:2010 [7:4:4] or inert gases. The unit requires a nominal DC operating voltage of 24 V within a 21.6 V to 26.4 V range, consuming a maximum electrical power of 4.2 W and 0.16 A of current, and accepts a 0 - 10 V analog input signal. Designed with any mounting position, Class 2 moderate corrosion stress resistance, and ISO 14644-1 cleanroom suitability, this component is restricted from oil-lubricated operation. 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 8203866. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.