Patent ID: 8261770
Filing Date: 2012-09-11
Classification: E03D,G01L,G01N,G05D,Y10T

Abstract:
1. A method of operating a flush valve in a waste water system comprising: providing a valve including a fluid inlet, 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, a vent outlet in flow communication with the fluid outlet of the valve, and an electronically operated solenoid having a piston configured to open the vent outlet upon energization thereof to establish flow communication between the control chamber and the vent outlet to vent fluid from the control chamber to the fluid outlet, and to close the vent outlet upon de-energization thereof; sensing the static fluid pressure of fluid within the vent system; calculating a valve operation time associated with delivering a predetermined quantity of water through the valve based on the static fluid pressure; energizing the solenoid for a time period associated with the valve operation time; monitoring the dynamic fluid pressure of fluid within the vent system during the valve operation; and adjusting the time period of energization of the solenoid based on the monitored dynamic fluid pressure to regulate the quantity of water delivered through the valve during valve operation.