If, after outbreak of fire one of the sprinkler heads opens, pressure maintained by the gas drops and non return valves allow the pressure in the supply pipe to drop. The decreased pressure in the supply pipe registers via the line in a chamber of the operating valve. Higher pressure in ...
If, after outbreak of fire one of the sprinkler heads opens, pressure maintained by the gas drops and non return valves allow the pressure in the supply pipe to drop. The decreased pressure in the supply pipe registers via the line in a chamber of the operating valve. Higher pressure in ...