VALVE FOR FIRE-EXTINGUISHING INSTALLATION Russian patent published in 1998 - IPC

FIELD: fire-firing equipment. SUBSTANCE: valve has rod which may move between position of valve readiness and position of valve operation. Acting on rod from atop is low pressure of liquid from auxiliary source to hold it in the position of valve readiness, and acting on rod from below in opposite direction is spring. When pressure in auxiliary source decreases to the preset value, due to supply of liquid from the source of spraying head in installation, spring moves rod to position of valve operation and communication is set up between valve inlet and its outlet. EFFECT: provision of a new valve for extinguishing installation operating reliably under high pressure without supply of electric power and its simple design. 6 cl, 2 dwg