| 摘要 |
FIELD: medicine, fire fighting equipment. ^ SUBSTANCE: valve for piping of fire extinguishing systems containing inlet device supplying with fire-extinguishing liquid under high pressure, outlet for fire-extinguishing liquid, located between the inlet and outlet shutoff valves and actuating devices for switching shutoff valves in open/closed position while at rest shutoff valves are in closed position and in case of fire an actuating devices switches shutoff valves from a closed position into an open position so that fire-extinguishing liquid from the inlet to the outlet. In order to maintain without loss of fire-extinguishing liquid it is suggested that there will be a possibility of switching into maintenance mode from closed position by means of actuating devices. ^ EFFECT: no leakage of fire extinguishing fluid from the inlet to the outlet in maintenance mode. ^ 13 cl, 7 dwg |
