Sprinkler valve, in particular Nassalarm-, dry pipe or deluge valve, and fire extinguishing system with just that

The invention relates to a fire extinguishing system valve (1), in particular Nassalarm-, dry pipe or deluge valve, comprising a housing (2, 3) defining a fluid inlet chamber (8), a fluid outlet chamber (9) and between a blocking state and a release state departures having reciprocable closing body (4a), wherein the fluid inlet chamber (8) and the fluid outlet chamber (9) in the released state fluidly communicate with each other directly, and the closing body (4a) in the blocking state, the direct communication between the fluid entrance chamber (8) and the fluid outlet chamber (9 ), prevents characterized by an integrated bypass line into the housing (10) that is (connected to the fluid inlet chamber 8) and the fluid outlet chamber (9) fluidically connected.