Spence Type Q Backpressure Pilot

Backpressure Pilot

Type Q

Type Q is designed as a self contained and spring operated pilot. Normally open and of packless construction, this pilot has four adjustable spring ranges. Typically used in fluid, gas and vapor applications. Type Q is available in three models;
Type Q: for +1 psig accuracy controlling back pressures between 3 and 150 psig.
Type Q2: for +2 psig accuracy controlling back pressures between 100 and 300 psig.
Type Q73: air adjusted for +1 psig accuracy controlling back pressure at high retained pressures when available loading air is at low pressure. Delivery to loading pressure is 6 - 2/3 to 1 psig.