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ndv阀门盘根知识你了解多少

文章来源:http://blogspo6.com/news289654.html 发表时间:2019-12-11 10:02:00

     安装ndv阀门天天中彩票app盘根时,必须依次将各个盘根环安装到位,直到完成全套盘根组。如此可确保轴向应力分布均匀,并降低摩擦力和泄漏率,降低甚至避免将来更换盘根或重新紧固压盖的需求,从而延长盘根组的使用寿命。反之如果安装一套五个盘根环,那么靠近压盖随动件的顶端盘根环受到的载荷大,但贴近工艺介质的底层盘根环受到的载荷很小,甚至可以忽略不计。原因是盘根环会降低轴向载荷,底层盘根环阻止介质泄漏的效果就会变差,无论其是切割缠绕还是模压成型盘根。还有一种情况是对盘根环顶端施加的载荷过大,导致ndv阀门阀杆转动时的摩擦力过大,甚至损坏盘根组。从一些数据可以看出,如果安装作业正确规范,盘根组在经历100次机械循环后,应力松弛的程度不超过20%。但如果安装不正确,应力甚至会减少60%左右,以至密封性能不在可靠。

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