The wet alarm valve is a one-way valve that only allows water to flow into the sprinkler system in one direction and drives supporting components to alarm under the specified pressure and flow. The wet automatic sprinkler system, which is composed of water flow indicator, pressure switch and sprinkler head, is a fixed system widely used. The pipe network of the system is always full of clean water with a certain pressure, and has been in a waiting state for a long time. When a fire occurs in the protection area, the ambient temperature in the area will rise, and the organic solution in the thermosensitive element (glass ball) of the sprinkler head will expand to generate a large internal pressure, resulting in the breakage of the glass ball shell, so as to start the sprinkler head to sprinkle water, and automatically start the whole system to send out audible and visual alarm signals, so as to achieve the purpose of fire alarm, fire control and fire suppression.
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