Wet alarm valve installation and maintenance precautions

Release time:

2023/06/26

After installation, the garbage and impurities in the fire pipeline must be removed.
2. The rubber sealing surface on the valve disc should be promptly removed from the dirt and foreign matter attached. If the rubber seal is worn and aged, it should be replaced in time (the rubber warranty period is 1 year).
3. The small holes and sealing surface in the annular groove of the valve seat sealing ring should be cleaned of dirt and foreign matter. The sealing surface should not be scratched. The small holes should be kept unobstructed and cannot be repaired and replaced.
4. Clean up the dirt in the filter in time and keep the pipeline unobstructed.
5. Check and clean the dirt in the delay device, and the throttle hole shall not be blocked by foreign matter.
6. Regularly check whether the control valves installed in various parts of the system are in the correct opening and closing state, whether there is leakage or damage, and deal with them in time.

Serial Number	Fault phenomenon	Possible causes	Exclusion method
1	Alarm valve block leaks	1. The drain valve is not completely closed 2. The valve flap gasket is aging or damaged 3. The system side pipeline interface leaks 4. The alarm pipeline test control valve leaks 5. The valve flap assembly and the valve seat are not sealed due to deformation or dirt and debris blocking.	1. Close the drainage valve 2, replace the valve disc gasket 3, check the leakage point of the pipeline connection on the system side, if the gasket is aging or damaged, replace the gasket; If the gasket is misplaced, readjust the position of the gasket; If the pipeline interface is rusted and seriously worn, replace the relevant parts of the pipeline interface 4, replace the alarm pipeline test control valve 5, drain water and flush the valve body and valve seat first. If dirt and sundries, after flushing, reduce or stop leakage; otherwise, close the control valve on the water inlet side and the system side, remove the valve plate, and carefully clean the debris on the valve plate; remove the alarm valve body, check the valve clack assembly and valve seat. If there is obvious deformation, damage or dent, replace the relevant accessories.
2	The alarm pipeline does not drain after the alarm valve is started.	1. The alarm valve pipeline control valve is closed 2. The filter screen of the filter is blocked	1. Open the alarm pipeline control valve 2. Remove the filter screen, flush it and reinstall it back to its original position.
3	Alarm pipeline false alarm	1. It is not installed according to the installation drawing or debugged according to the debugging requirements. 2. The leakage of the alarm valve group flows out through the alarm pipeline. 3. The orifice plate at the lower part of the delay device overflows and the water hole is blocked, causing an alarm.	1. Check the installation of the alarm valve group according to the installation drawing; Re-debug the alarm group's corresponding state 2, find out the cause of leakage, and carry out corresponding treatment 3, the lower hole of the delay device is blocked, remove the cylinder, remove the orifice plate for cleaning
4	Hydraulic alarm not working properly	1. Product quality problems or installation and debugging do not meet the requirements 2. Control port is blocked or the bell hammer mechanism is stuck	1, belong to the quality problem, replace the hydraulic alarm bell; If the installation lacks components or is not installed according to the drawing, re-install and debug 2. Remove the nozzle, impeller and bell hammer assembly, wash and re-assemble to make the impeller flexible.