原文：
阀后式直接作用压力调节阀的调节信号，ZMHN直接作用压力调节阀是一种不需要外加能源和操作介质，根据被控制流体的能量自行操作并保持阀前或阀后变量恒定的调节阀。 由阀前管道内取得，它随着作用在膜室上被调压力的增加，克服重锤所产生的力后，阀芯向下移动，逐渐离开阀座，使流通截面增加，由阀后管道内取得，它随着作用在膜室上被调节压力的增加，克服重锤所产生的力后，阀芯向下移动，逐渐与阀座闭合，使流通截面减小，阀芯向上运动，流通截面增加，直到被调压力等于给定值为止。阀前式直接作用压力调节阀的调节信号，直到阀前的压力下降到给定值；反之，当膜室上压力见效时，重锤所产生的力使阀芯上升，逐渐与阀座闭合，使流通截面减小，直到阀前压力增高到给定值为止。

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译文：
After the direct effect of valve type pressure regulating valve adjustment signal, ZMHN directly pressure regulating valve is a need for external energy and operating media, according to energy self-controlled fluid valve operation and keep before or after the variable valve control valve constant. Made before the pipeline by the valve, which in the film room with the role of the increasing pressure on be transferred to overcome the forces generated by heavy hammer, the spool moving down gradually from the valve seat to increase flow cross-section, after the pipe from the valve to obtain, it is the role of the film room as been adjusted to increase pressure to overcome the forces generated by heavy hammer, the spool moving down gradually closed with the valve seat so that flow area decreases, the spool upward movement, circulation, cross section increased, until it is adjusted until the pressure is equal to the given value. Direct role in front of the valve-type pressure regulating valve control signal until the valve before the pressure drops to a given value; the other hand, when the film room on the effective pressure, the force generated by heavy hammer to spool up, and gradually closed with the valve seat, to reduce the flow cross-section, until the valve before the pressure increased up to a given value.