(1)保持压力。

滑阀式换向阀都有间隙泄漏现象,只能短时间保压。当有保压要求时,可在油路上加一个液控单向阀,利用锥阀关闭的严密性,使油路长时间保压。

(2)液压缸的“支承"。

在立式液压缸中,由于滑阀和管的泄漏,在活塞和活塞杆的重力下,可能引起活塞和活塞杆下滑。将液控单向阀接于液压缸下腔的油路,则可防止液压缸活塞和滑块等活动部分下滑。

(3)实现液压缸锁紧。

当换向阀处于中位时,两个液控单向阀关闭,可严密封闭液压缸两腔的油液,这时活塞就不能因外力作用而产生移动。

(4)大流量排油。

液压缸两腔的有效工作面积相差很大。在活塞退回时,液压缸右腔排油量骤然增大,此时若采用小流量的滑阀,会产生节流作用,限制活塞的后退速度;若加设液控单向阀,在液压缸活塞后退时,控制压力油将液控单向阀打开,便可以顺利地将右腔油液排出。

(5)作充油阀。

立式液压缸的活塞在高速下降过程中,因高压油和自重的作用,致使下降迅速,产生吸空和负压,必须增设补油装置。液控单向阀作为充油阀使用,以完成补油功能。

(6)组合成换向阀。

在设计液压回路时,有时可将液控单向阀组合成换向阀使用。例如:用两个液控单向阀和一个单向阀并联(单向阀居中),则相当于一个三位三通换向阀的换向回路。需要指出,控制压力油油口不工作时,应使其通回油箱,否则控制活塞难以复位,单向阀反向不能截止液流。

常规

水力的

(1)

型号提供：

力士乐液控单向阀R900587559  SL20PA1-4X/

力士乐液控单向阀SL20PA1-4X/6U R901188104

力士乐液控单向阀R901188104  SL20PA1-4X/6U

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力士乐液控单向阀R900207274  SL20PA1-4X/JV

力士乐液控单向阀SL20PA1-4X/6U R901188104

力士乐液控单向阀R900599358  SL20PA1-4X/SO279

力士乐液控单向阀R900220252  SL20PA1-4X/SO113

力士乐液控单向阀R900501405  SL20PA1-4X/SO113

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力士乐液控单向阀R901093767  SL20PA1-4X/VSO113

力士乐液控单向阀R900599536  SL20PA2-4X/

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力士乐液控单向阀R901369998  SL20PA2-4X/J50

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力士乐液控单向阀R900599606  SL20PA3-4X/

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力士乐液控单向阀R900500630  SL20PA4-4X/

力士乐液控单向阀R900532373  SL20PA4-4X/J

力士乐液控单向阀R901430277  SL20PA4-4X/J3

力士乐液控单向阀R901368271  SL20PA4-4X/J50

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