What is Wet Alarm Valve?
A wet alarm valve is the central nervous system of an automatic sprinkler system. Whether it operates normally or not directly affects the normal operation of the entire system, so the daily maintenance of a wet alarm valve is very important.
1. We should check whether the rotation of the alarm bell is normal once every half a month. Open sanitary valve when checking. The alarm valve flap automatically opens due to the water pressure difference. The alarm bell sounds alarmed 20 to 30 seconds after water flows into the delay device. If the alarm bell doesn’t sound alarmed, we should check the entire alarm bell pipeline to remove water residues, mud, sand, and filthy matters to make the water flow smoothly and prevent alarm failure. If the alarm bell still sounds alarmed after the alarm bell check plug is closed, we should check whether the check plug is tightly closed, whether there are obstacles accumulated on the ring-shaped water tanks, whether the rubber under the alarm valve flap is aging or wrinkles. These failures should be promptly excluded.
2. Check the flowing water pressure once every six months. Open the valve when checking, and the alarm bell sounds alarmed. At this time, the pressure gauge should not show a significant drop in pressure. If the drop in pressure is rather significant, we should check whether the gate valve is blocked or isn’t opened to the largest extent. If the pressure gauge shows a significant drop in pressure and the alarm bell doesn’t sound alarmed, we should check whether the start-up of the valve flap of the wet alarm check valve is normal.
3. Check the sealing surface of the rubber gasket on the valve flap, and remove filthy matters or irrelevant matters attached to the rubber sealing gasket. If there is wear or damage, they should be promptly replaced.
4. We should check the sealing member and ring-shaped groove of the valve seat, and remove filthy matters or irrelevant matters. If there is damage, they should be replaced with spare parts.
5. According to the quality of water for firefighting, regularly open the sewage outfall on the filter and clean up dirty matters.
6. Pay daily attention to the water level and water pressure of the firefighting pool and the corresponding valve status to see if they’re in line with regulatory requirements.
7. The handling of a false alarm: When a false alarm is found, we can check whether the entire pipe network is leaking water, whether the spill hole of the delay device is blocked or poorly drained. Opening the discharge test valve can empty the accumulated water in the system or check if the water supply pipe network is blocked.
Check whether the sealing between the wet alarm valve flap and the valve seat is not tight, making a large amount of water enter the delay device. Check whether the nozzle in the pipe network causes the release mechanism to start due to an accident. After the cause of a false alarm is found out, we should promptly deal with it to ensure the system is in a good standby state at any given time.
Thank you for reading our article and we hope it can help you better understand the introduction of wet alarm valves. If you want to learn more about the introduction of wet alarm valves, we would like to advise you to visit Adamant Valve homepage for more information.