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Two methods to improve the life of regulating valve
The author: Time:2019/12/27

1.大开度工作延长寿命法
        让调节阀一开始就尽量在开度上工作,如90%,这样,汽蚀、冲蚀等破坏发生在阀芯头部上。随着阀芯破坏,流量增加,相应阀再关一点,这样不断破坏,逐步关闭,使整个阀芯全部充分利用,直到阀芯根部及密封面破坏,不能使用为止。同时,大开度工作节流间隙大,冲蚀减弱,这比一开始就让阀在中间开度和小开度上工作提高寿命1 ~5倍。
2.减小s增大工作开度提高寿命法
        减小s,即增大系统除调节阀外的损失,使分配到阀上的压降降低,为保证流量通过调节阀,必然增大调节阀开度,同时,阀上压降减小,使气蚀、冲蚀也减弱。具体办法有:阀后设孔板节流消耗压降;关闭管路上串联的手动阀,至调节阀获得较理想的工作开度为止。
 

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