DRY ALARM VALVE ASSEMBLY FOR CONTROLLING A SPRINKLER FIREFIGHTING SYSTEM

摘要

A dry alarm valve assembly, for controlling a sprinkler firefighting system, has a first inlet connected to a pressurised air source, a second inlet connected to a pressurised water source, an outlet connected to a network of channels for supplying the sprinklers, and a valve that opens/closes a flow of water from the second inlet to the outlet; between the valve and the outlet there is a chamber communicating with the first inlet through a first pneumatic line, which includes a one-way valve; the assembly is provided with a blocking device to hold the valve closed and provided with a second pneumatic line, which is connected to an actuator of the blocking device so as to operate such actuator by means of pressurised air.