A PILOT REGULATOR

摘要

A pilot regulator (30) to control the pressure at which a regulator operates. The pilot regulator comprises an inlet port to receive high pressure gas from a cylinder and a pilot valve element (37) biased towards the inlet port to control the flow of gas through the inlet port. The biasing force provided by the biasing element is adjustable by an actuator (35) to control the pressure of pilot gas passing through the inlet port to a regulator (10). The biasing element (33) is arranged to bias the pilot valve element open while a balancing biasing element (34) is positioned between the pilot actuator and the pilot valve element to provide an opposing force on the pilot valve element.