Spray head provided with a pressure sensitive valve

摘要

PCT No. PCT/FI94/00046 Sec. 371 Date Nov. 23, 1994 Sec. 102(e) Date Nov. 23, 1994 PCT Filed Jan. 31, 1994 PCT Pub. No. WO94/16771 PCT Pub. Date Aug. 4, 1994A spray head has a housing, an inlet and nozzles. A release ampoule is mounted in the housing and a spindle element (33) is pressed against the inlet of the spray head by a spring having such a spring force that the spindle element keeps the inlet closed against a stand-by pressure but yields to high pressure extinguishing liquid of a high pressure source for delivering the liquid to the nozzles while the release ampoule remains intact even when a force of the spring acts on the release ampoule.