| 摘要 |
A check valve assembly has a valve seat for positioning in a passageway between a water supply and an outlet device such as a sprinkler head or a pipe section. A disc valve is located on the water supply side of the valve seat, and a separate actuator is movably mounted on the opposite side of the seat for movement between an operative position extending through the valve seat to hold the valve in the open position, and an inoperative, retracted position. The disc valve is moved by the actuator into the open position when the sprinkler head is located at the outlet. Release or removal of the actuator as a result of removal of the sprinkler head or other outlet device will allow fluid pressure at the fluid supply end of the passageway to urge the valve into the closed position.
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