High pressure valve for fire extinguishing nitrogen has a gas pressure blocking valve released by a light electromagnetic valve and the gas pressure

摘要

The nitrogen valve (1) has a seat (23) closed by a rod (19) and spring (31) loaded piston (13). The high pressure inlet (11) also closes an electromagnetic valve armature (37) which, when actuated, releases the gas pressure to the piston chamber (15) to open the gas valve.