Rexroth力士樂溢流閥DBE 10-3X315YG24J

電動調(diào)節(jié)閥使用時，若發(fā)生外漏現(xiàn)象，我們該如何去應對，這里給大家介紹電動調(diào)節(jié)閥外漏的五個解決方法：

電動調(diào)節(jié)閥外漏的五個解決方法之采用透鏡墊密封法

對于上、下蓋的密封,閥座與上、下閥體的密封.若為平面密封,在高溫高壓下,密封性差,引起外泄,可以改用電動調(diào)節(jié)閥透鏡墊密封,能得到滿意的效果。

電動調(diào)節(jié)閥外漏的五個解決方法之改變流向

置P2在閥桿端法;當△P非常大,P1又非常大時,密封P1顯然比密封P2困難.因此,電動調(diào)節(jié)閥可采取改變流向的方法,將P1在閥桿端改為P2在閥桿端,這對壓力高、壓差大的閥是較有效的.如波紋管閥就通常應考慮密封P2。

電動調(diào)節(jié)閥外漏的五個解決方法之增加填料法

通常是采用雙層或者多層混合填料的形式單純地增加密封墊片的數(shù)量，如將3片增加到5片，來提高閥桿的密封性能，不過電動調(diào)節(jié)閥防漏效果不是很明顯。

電動調(diào)節(jié)閥外漏的五個解決方法之增加密封油脂法

這種方法是針對還未使用密封油脂的閥體，可以考慮增加密封油脂來提高閥桿的密封性能的。平時日常維護電動調(diào)節(jié)閥的時候，增加補充密封油脂也是必要的維護程序之一。

電動調(diào)節(jié)閥外漏的五個解決方法之是更換石墨填料法

大量被使用的四氟填料，其適用工作溫度在-20～200℃范圍內(nèi)，當工作溫度在上限、下限變化非常大時，電動調(diào)節(jié)閥密封性能便明顯下降了，且老化快，壽命短。這里推薦使用柔性石墨填料可以克服四氟填料所不能承受的困難，且使用壽命長，從而提高密封的可靠性。有很多工廠已經(jīng)全部將四氟填料改為石墨填料了，甚至新購買的調(diào)節(jié)閥也將其中的四氟填料換成石墨填料后使用。但是石墨填料也有個缺點，就是回差大，初時有的還產(chǎn)生爬行現(xiàn)象，對此，生產(chǎn)商和使用商在設計安裝電動調(diào)節(jié)閥設備時也要有所考慮。

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