| 摘要 |
A flush valve for a waste water system comprises 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 also includes a vent system comprising a control chamber in flow communication with the fluid inlet of the valve and a vent outlet in flow communication with the fluid outlet of the valve, and a solenoid for venting fluid venting fluid from the control chamber to the fluid outlet. A pressure sensor, such as an electronic pressure transducer, senses the fluid pressure of fluid within the vent system. When a predetermined pressure threshold is reached or exceeded, the solenoid can be energized to release fluid from the control chamber. |
| 主权项 |
1. A system for detecting wear in a flush valve, comprising:
(a) a flush valve including a fluid inlet, a fluid outlet, and a main valve element adapted for movement to allow water flow between the fluid inlet and the fluid outlet based on a pressure differential across a portion of the main valve element, the flush valve comprising a vent system for venting water 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 thereby causing operation of the flush valve, the vent system comprising a control chamber in flow communication with the fluid inlet of the flush valve, and a vent outlet in flow communication with the fluid outlet of the flush valve; and (b) at least one microprocessor configured to:
(i) determine a detected water pressure within the vent system at a predetermined time after operation of the flush valve, the predetermined time comprising a known time required to achieve a water pressure necessary to reseal the flush valve during normal operation; and(ii) compare the detected water pressure with a predetermined water pressure, the predetermined water pressure comprising the water pressure necessary to reseal the flush valve during normal operation. |
