The wet alarm valve is a key component of the wet automatic sprinkler fire extinguishing system. It is suitable for buildings and structures with an ambient temperature of 4°C-70°C and can be used for fire extinguishing. It is usually installed in production sites, warehouses, Hotels, shopping malls, hospitals, theaters, high-rise office buildings and garages, etc. The number of sprinklers controlled by each system shall not exceed 800.