ANSI Flange End 232PSI 150mm Alarm Check Valve
A wet alarm valve is a critical component in a fire protection system, designed to detect the flow of water within a sprinkler system. It is typically installed in a wet pipe system and remains closed until the pressure drop caused by water being released from a sprinkler head is detected. Upon activation, the valve opens to allow water to flow into the system, and simultaneously, it triggers an alarm and may initiate additional responses such as activating a fire pump or alerting the building's occupants through a visual or audible signal.
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Daily inspection and maintenance of wet alarm valve
1. Regularly inspect the rubber gasket on the valve disc to ensure that its sealing surface is clean and undamaged. If necessary, clean or replace it.
2. Check the annular groove and small hole of the valve seat to ensure that there is no accumulation of sediment and dirt, and clean it if necessary. At the same time, confirm that the sealing surface of the valve seat is flat, without any scratches or indentations. If necessary, repair or replace it.
3. Check the leaking joint of the delay device to ensure unobstructed flow, and clean it if necessary.
4. The maintenance of the hydraulic alarm gong should be checked once every quarter to ensure that the alarm sound is loud. The filter
on the alarm pipeline should be cleaned, and the bell shell should be removed to thoroughly remove dirt and mud.
5. Check the pressure switch, and after installation, check its operational reliability. Regularly inspect it according to relevant standards or regulatory requirements. It is recommended to test it every three months or more frequently.
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FAQ
Q: How often should wet alarm valves be inspected and maintained?
A: Wet alarm valves should be inspected bi-monthly for bell functionality and annually for overall condition, including seal and valve seat checks.
Q: What actions should be taken if a wet alarm valve malfunction is detected?
A: Immediate steps should include isolating the system, identifying the cause of the malfunction, and either performing repairs with the help of a professional or replacing necessary components.
Q: Is there a specific procedure for testing the wet alarm valve's alarm function?
A: Yes, the alarm function should be tested bi-monthly by opening the water valve to check if the water pressure drop activates the alarm bell within 20-30 seconds.
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