| 摘要 |
A water freeze guard valve having a water-filled actuator chamber and a linkage assembly for transmitting linear expansion movement, caused by ice formation within the actuator chamber, to force a poppet disc against the seat of the valve supply port and thereby close the valve when freezing conditions occur, a latch assembly for keeping the valve open prior to freezing weather, a spring to keep the valve closed during the subsequent thaw, and a lever for manually and selectively re-opening the valve. When installed in a water supply line for a building structure that is subject to freezing and thawing conditions, the valve shuts off the supply of water to the building structure during the freeze and prevents further supply of water to the building after the thaw occurs so that the interior of the building is not damaged by flooding.
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