| 摘要 |
A purge valve comprising a valve body having a valve inlet and a valve outlet and a water flow passage between the valve inlet and the valve outlet; first valve means adapted to set the valve in open position by opening the water flow passage in response to a user's action; second valve means adapted to hold the valve in open position if and until the water flowing through the water flow passage is below a predetermined temperature; third valve means adapted to automatically set the valve in close position when the water flowing through the water flow passage is at the predetermined temperature; and, fourth valve means adapted to alert the user that the valve has closed and water having the predetermined temperature is available at the valve inlet.
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