| 摘要 |
A flush valve includes: a valve body having a diaphragm valve flexibly formed in the valve body communicated with an inlet pipe for supplying inlet water and an outlet pipe connected to a toilet, a urinal or a sprinkler system, a filter and a magnet mounted in the diaphragm valve for filtering out the dirts or rust carried in the water, a limit valve formed in the valve body juxtapositioned to the diaphragm valve for automatically closing the relief vents and passages between the diaphragm valve and the outlet pipe in case of failure of a manual relief valve or an electrically operated relief valve, which controls the opening or closing of the diaphragm valve, with the manual relief valve operatively opening the relief vents or passages at the downstream side of the diaphragm valve in a pre-set time period for timely opening the diaphragm valve, and a self-regulating valve provided in the outlet pipe for automatically maintaining a constant water flow rate when subjected to a fluctuated water pressure in a plumbing system.
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