原文：
进口蒸汽减压阀的基本原理和使用方法： 　　一、基本原理： 　　1、调压范围：它是指减压阀输出压力P2的可调范围，在此 范围内要求达到规定的精度。调压范围主要与调压弹簧的钢度有关。 　　2、压力特性：它是指流量g为定值时，因输入压力波动而引起输出压力波动的特性。输出压力波动越小，减压阀的特性越好。输出压力必须低于输入压力—定值才基本上不随输入压力变化而变化。 　　3、 流量特性：它是指输入压力—定时，输出压力随输出流量g的变化而变化的持性。当流量g发生变化时，输出压力的变化越小越好。一般输出压力越低，它随输出流量的变化波动就越小。 　　二、使用方法： 　　1、首先根据使用要求选定减压阀的类型和调压精度； 　　2、再根据所需{zd0}输出流量选择其通径。决定阀的气源压力时，应使其大于{zg}输出压力0．1MPa。阀门 进口泵 工业洗衣机 　　3、减压阀一般安装在分水滤气器之后，油雾器或定值器之前，并注意不要将其进、出口接反； 　　4、阀不用时应把旋钮放松，以免膜片经常受压变形而影响其性能。

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译文：
Inlet steam pressure reducing valve and use the basic principles: 1, the basic principle: 1, Voltage range: it is the regulator output pressure P2 of the tuning range, in this context requests the required accuracy. The major areas of spring surge of steel with the degree of the surge. 2, the pressure characteristics: it refers to the flow g as the set value, the pressure fluctuations caused by input output characteristics of pressure fluctuations. Smaller fluctuations in output pressure, pressure reducing valve features the better. Output pressure must be lower than the input pressure - it basically does not set value varies with the input pressure. 3, flow characteristics: it means that the input pressure - time, the output pressure with changes in the output flow g support of change. G when the flow changes, the output pressure change as small as possible. Generally the lower the output pressure, which changes with fluctuations in the output flow smaller. Second, use: 1, the first selected according to application requirements and the pressure regulator valve of the type of precision; 2, then according to the required maximum output flow to choose their path. Determine valve pressure gas source should be greater than its maximum output pressure of 0.1MPa. Imports of industrial washing machine pump valve 3, pressure reducing valve is usually installed in the watershed after the filter device, oil mist, or fixed value of device before, and be careful not to import and export reversed; 4, valve not relax when the knob to prevent the deformation of diaphragm compression often affect their performance.