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RELIEF AND DRAIN VALVE MECHANISM FOR AN AIRCRAFT ACCUMULATOR

Port 1 of the valve is connected to the accumulator, port 2 to the tank, and port 3 to the main hydraulic system of the aircraft. Nonreturn valve 4 admits fluid under pressure from the main hydraulic system to the accumulator and prevents flow in the reverse direction. Thus, if the main hydraulic system gets out of order, there is always fluid available under pressure in the accumulator to operate…