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在输油系统中一般都采用气缸阀，在启停机泵时采用手动操作。本文分析气缸阀的传输特性，通过改造气路的方法，用开关阀实现对输出压力的自动调节，进而实现机泵启停的自动化。
Cylinder valves are generally used in the oil delivery system, and manual operation is used when starting and stopping the pump. This article analyzes the transmission characteristics of the cylinder valve, through the transformation of gas way, with the on-off valve to achieve the automatic adjustment of the output pressure, and then start and stop the pump to achieve automation.