Patent ID: 8215327

Claim:
A method of regulating pressure within a flush valve in a waste water system, comprising: providing a valve body including a fluid inlet and a fluid outlet and a main valve element adapted for movement to allow fluid flow between the fluid inlet and the fluid outlet based on a pressure differential across a portion of the main valve element, the valve comprising a vent system for venting fluid from the fluid inlet to the fluid outlet to establish a pressure differential across a portion of the main valve element to cause the main valve element to open, the vent system comprising a control chamber in flow communication with the fluid inlet of the valve body and a vent outlet in flow communication with the fluid outlet of the valve body and a solenoid having a piston operable in a core tube in flow communication with the control chamber; sensing the fluid pressure of fluid within the vent system; venting fluid within the vent system of the valve to the fluid outlet in a relief venting step when the fluid pressure within the vent system exceeds a predetermined pressure threshold corresponding to a relief pressure for the valve; and maintaining the fluid pressure within the vent system above a threshold so as to prevent the pressure differential across the main valve element from causing the main valve element to open during the relief venting step.