Corrosion products formed by these reactions can prevent normal valve operation and can become embedded in the elastomeric stem tip, preventing the valve from making a complete seal.
这些反应产生的腐蚀产物会阻止正常的阀门运转，深入到人造橡胶阀杆顶端，造成阀门不能完全密封。
2
When the hydraulic system up to the tip is set higher than the pressure relief valve, the relief valve on top of the ball was opened by the oil relief valve to the tank platoon.
当系统中的油压升高到梢高于溢流阀的调定压力时，溢流阀上的钢球被顶开，油液经溢流阀排回油箱。
3
Diefa is used to open and close a circular Tip plates and then Fagan moves to open, and closed a valve to regulate fluid passages.