The EPTA® PR pressure pre-reducer is used mainly in pilot regulating valves or in pneumatic instruments to control the regulated pressure and to keep it stable regardless the downstream variation. In order to make the outlet pressure pair the variations of the signal, and thus to maintain a constant differential in the pilot so as to have a better control of the valve.
As the name suggests, it is used to reduce the inlet pressure to a pilot, thus improving the performance of the valve the pilot controls.