先導(dǎo)式單向閥是一種先導(dǎo)式液控單向閥,它由
先導(dǎo)閥和液控單向閥兩部分用可拆連接組合一
采用軟硬結(jié)構(gòu),閥芯軟密封面壓縮量在閥座上
受限制。特別適用于需長期保壓的液壓系統(tǒng),
體。由先導(dǎo)閥來控制液控單向閥的出口、控制
,使液流反向流動。為了提高密封性和確保良
好使用壽命,先導(dǎo)閥和液控單向閥的閥芯閥座
口斷開或接通,實現(xiàn)利用負(fù)載壓力推開單向閥
用于氣壓系統(tǒng)效果相同。
性能:
液控單向閥采用錐形閥芯,因此密封xn好。
方式有內(nèi)泄式和外泄式二種。在油流反向出口
在要求封閉油路時,可用此閥作為油路的單向
鎖緊而起保壓作用。液控單向閥控制油的泄漏
無背壓的油路中可用內(nèi)泄式;否則需用外泄式
,以降控制油壓力。
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