HO-Trerice - Model 921 Series - Pressure Regulator - Brochure

The Trerice 921 Series Pressure Regulator is fully self-contained and requires no external power source. This regulator requires thai a user-supplied pressure sensing line be connected from the controlled point to the diaphragm actuator. Pressure in this line acts upon the diaphragm to develop the necessary thrust to stroke the valve, thereby maintaining the system at the desired condition.