原装力士乐比例减压阀R900418492 3DREP 6 A-1X/25A24Z4M

力士乐比例减压阀

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R900390318 3DREP 6 A-1X/16A24N9Z4M

R900494163 3DREP 6 A-1X/16A24NK4M

R900494162 3DREP 6 A-1X/16A24NK4V

R900494151 3DREP 6 A-1X/16A24NZ4M

R900494150 3DREP 6 A-1X/16A24NZ4V

R900494149 3DREP 6 A-1X/16A24Z4M

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R900498468 3DREP 6 A-1X/25A12K4M

R900498470 3DREP 6 A-1X/25A12K4V

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R900560398 3DREP 6 A-1X/25A24NZ4MR

R900418495 3DREP 6 A-1X/25A24NZ4V

R900486430 3DREP 6 A-1X/25A24Z42M

R900418492 3DREP 6 A-1X/25A24Z4M

R900418494 3DREP 6 A-1X/25A24Z4V

R900536533 3DREP 6 A-1X/45A12N9Z4M

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R900494198 3DREP 6 A-1X/45A24NK4V

R900494187 3DREP 6 A-1X/45A24NZ4M

R900494186 3DREP 6 A-1X/45A24NZ4V

R900494185 3DREP 6 A-1X/45A24Z4M

R900494184 3DREP 6 A-1X/45A24Z4V

R900954474 3DREP 6 A-2X/16EG24K4/M

R900954411 3DREP 6 A-2X/16EG24K4/V

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R900494157 3DREP 6 B-1X/16A24K4M

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R900945993 3DREP 6 B-1X/16A24N9K4M

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自力式调节阀工作原理

1 、自力式调节阀工作原理（阀后压力控制） 

工作介质的阀前压力 P1 经过阀芯、阀座后的节流后，变为阀后压力 P2 。 P2 经过控制管线输入到执行器的下膜室内作用在顶盘上，产生的作用力与弹簧的反作用力相平衡，决定了阀芯、阀座的相对位置，控制阀后压力。当阀后压力 P2 增加时， P2 作用在顶盘上的作用力也随之增加。此时，顶盘的作用力大于弹簧的反作用力，使阀芯关向阀座的位置，直到顶盘的作用力与弹簧的反作用力相平衡为止。这时，阀芯与阀座的流通面积减少，流阻变大，从而使 P2 降为设定值。同理，当阀后压力 P2 降低时，作用方向与上述相反，这就是自力式（阀后）压力调节阀的工作原理。 

2 、自力式调节阀工作原理（阀前压力控制） 

工作介质的阀前压力 P1 经过阀芯、阀座后的节流后，变为阀后压力 P2 。同时 P1 经过控制管线输入到执行器的上膜室内作用在顶盘上，产生的作用力与弹簧的反作用力相平衡，决定了阀芯、阀座的相对位置，控制阀前压力。当阀后压力 P1 增加时， P1 作用在顶盘上的作用力也随之增加。此时，顶盘的作用力大于弹簧的反作用力，使阀芯向离开阀座的方向移动，直到顶盘的作用力与弹簧的反作用力相平衡为止。这时，阀芯与阀座的流通面积减大，流阻变小，从而使 P1 降为设定值。同理，当阀后压力 P1 降低时，作用方向与上述相反，这就是自力式（阀前）压力调节阀的工作原理。