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for the valve, with particular emphasisgate valves
on regular inspections found dirt, rust stains should be promptly removed; piston ring damage should be updated; spring failure to replace available; sealing surface, such as not close together, should be re-grinding; patch not working to be replaced; as confirmed by the use of valve handle more coarse sanding applications
third, the pressure valve can not be adjusted in addition to globe valves
the above-mentioned reasons, there are:
① adjusting spring failure; ② cap leaking joints, can not keep up the pressure
this also depends on timely check processing to prevent
in addition, there is a phenomenon plug valves
that the valve pressure pulse wave, very unstable this is the difference between the input medium and output medium is too big, therefore, to be quite re-select valve diameter of the valve there is also a cause of instability in pressure causes the valve is properly adjusted spring selection; a nominal pressure reducing valve, adjusting the spring there are several, such as nominal pressure ofkgsquare centimeter, adjust balance valves
the spring there are - kgcm - kgcm, - kilogramssquare centimeter of three, if the back pressure valve only - kgsq cm, while the spring is - kgforged steel valves
square centimeter that species, the valve allowed the pressure to adjust
原文来自 cadillacforumsforumscadillac-deville---including--egr-valve
cadillac forums: egr valve;是由 上海埃非凯阀门有限公司提供的阀门新闻，中文译文仅供参考,以下提供站内导航搜索
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以下是参考译文
译文自动阀门常见故障分析及预防措施
对于减压阀，特别要强调定期检查。如磁力泵
发现污物锈渍要及时除去；活塞环损坏应更新；弹簧失效要换成可用的；密封面如不密合，应重新研磨；膜片不灵要更换；经使用如确认阀柄较粗，应用砂纸打磨。
三，阀后压力不能调节。除上述各种原因外，还有
①调节弹簧失灵；②帽盖过滤器
接缝泄漏，不能保持压力。
这也要靠及时检查处理来预防。
此外，还有一种现象，就是阀后压力脉冲波动，极不稳定。这是输入介质与隔膜泵
输出介质差量太大之故，应重新选择阀径相当的阀门。还有一个造成阀后压力不稳的原因是，调节弹簧选择不当；一种公称压力的减压阀，调节弹簧有几种，例如公称压力为公斤平方厘米，调节弹簧就有－公斤平方厘米－公斤平方厘米－管道泵
公斤平方厘米三种，假如阀后压力只需－公斤平方厘米，而弹簧却是－公斤平方球阀
厘米的那种，阀后压力就调不准了。
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