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

FIELD: valves for fire-extinguishing plant operating under high actuating pressure. SUBSTANCE: valve includes rod with axial throttle 9 designed for provision of communication from inlet hole 6 through throttle 9 and actuating unit 2 sensitive to liquid flow to outlet hole in the first position of rod. In this case rod is fixed with spring in the first position when pressure proves to be similar on both sides of throttle rod. Throttle is installed to ensure pressure differential across it due to flow of liquid through it at working pressure of fire-extinguishing plant large enough for moving the rod from the first to the second positions. EFFECT: provision of novel simple in design valve for fire-extinguishing plant. 4 cl, 3 dwg