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力士乐\内啮齿轮泵\PGM4-300 40RA11VU2
联系人：18965852209   QQ：2277643779  （小崔）
 
 
 
DKE-1630/2-X, 换向阀减压阀调压阀的选用标准：
1、 在给定的弹簧压力级范围内，使出口压力在大值与小值之间能连续调整，不得有卡阻和异常振动;
2、 对于软密封的减压阀，在规定的时间内不得有渗漏;对于金属密封的减压阀，其渗漏量应不大于大流量
3、 出口流量变化时,直接作用式的出口压力偏差值不大于20%,先导式不大于10%;
4、 进口压力变化时，直接作用式的出口压力偏差不大于10%，先导式的不大于5%。
5、 通常，减压阀的阀后压力应小于阀前压力的0.5倍;
6、 减压阀的应用范围很广，在蒸汽、压缩空气、工业用气、水、油和许多其他液体介质的设备和管路上均可使用，介质流经减压阀出口处的量，一般用质量流量或体积流量表示;
7、 波纹管直接作用式减压阀适用于低压、中小口径的蒸汽介质; 8、 薄膜直接作用式减压阀适用于中低压、中小口径的空气、水介质;
9、 先导活塞式减压阀，适用于各种压力、各种口径、各种温度的蒸汽、空气和水介质，若用不锈耐酸钢制造，可适用于各种腐蚀性介质;
10、 先导波纹管式减压阀，适用于低压、中小口径的蒸汽、空气等介质;
11、 先导薄膜式减压阀，适用于低压、中压、中小口径的蒸汽或水等介质;
12、 减压阀进口压力的波动应控制在进口压力给定值的80%～105%，如超过该范围，减压前期的性能会受影响;
13、 通常减压阀的阀后压力应小于阀前压力的0.5倍;
14、 减压阀的每一档弹簧只在一定的出口压力范围内适用，超出范围应更换弹簧;
15、 在介质工作温度比较高的场合，一般选用先导活塞式减压阀或先导波纹管式减压阀;
16、 介质为空气或水(液体)的场合，一般宜选用直接作用薄膜式减压阀或先导薄膜式减压阀;
17、 介质为蒸汽的场合，宜选用先导活塞式或先导波纹管式减压阀;
18、 为了操作、调整和维修的方便，减压阀一般应安装在水平管道上
 
 

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