PRESSURE ACTIVATED VALVE FOR FIRE FIGHTING INSTALLATION

摘要

The object of the invention is to for a fire fighting installation with a high operating pressure provide a new valve which is reliable without access to electric current and is of a simple structure. The valve has a spindle (7) which is movable between a stand-by position and an activated position. A secondary liquid source (16) with a low pressure acts on the spindle in the direction towards the stand-by position and a spring (13) acts on the spindle in the opposite direction. When the pressure in the secondary liquid source due to liquid delivery to a released spray head in the installation has fallen to a predeterminable value the spring (13) drives the spindle to activated position and opens direct connection from the inlet (4) of the valve to its outlet (5).