Wet alarm valve is automatic sprinkler system, central nervous system, the normal operation of whether or not it directly affects the normal operation of the whole system, so the wet alarm valve routine maintenance is very important.
1, an alarm should be turned half check whether it is normal, check valve when the play opened, alarm valves due to water pressure valve automatically opens, water flows into the retarder by 20-30 seconds after the alarm bells sound. If the alarm does not send sound, should check the alarm piping, excluding its scale, sediment and dirt, so that water flow to prevent the alarm failure. If the alarm check cocks closed, the alarm is still sound, it should check whether the verification cock tightly closed, in the alarm valve annular tank whether the accumulation of obstacles, alarm valve under the rubber flap is aging or wrinkles. These failures should be immediately removed.
2, semi-annual checkup flow pressure, check valve open play, alarm bells sound, this time, pressure gauge shows the pressure values should be decreased, if the drop is more significant, should check whether the plug or gate valve to open Maximum; If the pressure gauge shows the pressure drops more obvious, and the alarm did not the police, should check the wet alarm valve flap valve starts are normal.
3, check valve flap on the rubber gasket sealing surface, clear rubber sealing pad attached to the dirt and foreign matter; if worn or damaged should be replaced promptly.
4, should be checked once a year seal and valve seat ring slots, removing dirt or foreign body; if damaged, should be replaced spare parts.
5, according to the water quality of water from fire service, regular open sewage outfall on the filter, clean dirt.
6, daily attention to the fire pond water level and water pressure and the corresponding valve in which the state is in line with regulatory requirements.
7 False Alarm handling:
Found that false alarm, they can look at the entire pipe network is leaking, check the delay overflow drainage holes are blocked or impeded. Open the bleed valve may be emptying test or inspection within the system water supply pipe network is blocked.
Check wet alarm valve valve seat valve components and the question of whether Mifengbuyan, so that large amounts of water into the retarder.
Check the sprinkler pipe network Whether the cause of the accident led to the release mechanism to start.
Identify the reasons for false alarms, should a timely manner in order to ensure that the system at all times in good standby.
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