CROSS LINE RELIEF VALVE MECHANISM

摘要

A cross line relief valve mechanism includes a pair of opposed relief valves contained in a bore connecting the service passages of a control valve. A high pressure condition in one of the service passages acts directly on the main poppet of one of the relief valves causing it to become unseated and communicating the high pressure condition to a zone in the bore between the two relief valves. The high pressure condition in this zone acts on the pilot poppet of the other relief valve causing it to open which results in the unseating of the main poppet in that relief valve. The high pressure condition in one of the service passages thus results in the opening of both valves so as to allow high pressure fluid to flow from one service passage to the other in order to obtain a balanced condition.