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1·Describing several structures of stem seal and existent problems.

阐述了阀杆密封的几种结构及存在的问题。

2·The backup seal is secondary to the main stem seal assembly (20) in the bonnet (12).

备用密封件是阀帽(12)内主阀杆密封组件(20)的二级密封。

3·Introducing a new type of structure for replaceable stem seal sleeve with containing pressure and analyzing its high performance.

介绍了一种新型的可带压更换阀杆密封的结构，分析了该结构的优良性能。

4·The stem seal of a feed water control valve uses expanded graphite packing in order to produce friction and to economize on energy for the control valve working.

电站锅炉给水调节阀的阀杆密封采用柔性石墨填料，既降低了摩擦力，又为调节阀的运行节约了能源。

5·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。

6·The same force tends to reduce the seal on the pressure side with the result that bonnet cavity and the valve stem packing are nearly always subjected to maximum pipeline pressure.

而压力侧以相同的力削弱了密封，这样使阀盖腔室和阀杆填料几乎总是承受最大管道压力。

7·When the closed channel, the wedge-shaped head with a stem to open up the ball and pressed to seal the valve seat.

当关闭通道时，用阀杆的楔形头使球体涨开与阀座压紧达到密封。

8·This arrangement combined with the feature of a non-rising stem assures a positive seal against either steam or water.

这种结构方式具有不上升阀杆的特点，保证了对蒸汽或水都能够达到很好的密封功能。

9·Based on customers requirement, a packing tightening design may be employed to obtain more reliable stem packing seal, which is loaded by bevelling spring.

根据用户的需要，可以采用碟形弹簧加载的填料压紧机构，使阀杆填料的密封更加可靠。

10·Start stem O-ring seal over stem, then press into position as handle is pressed down over stem.

从阀杆上的阀杆O形环密封开始，然后在手柄安装在阀杆上后，将其压进手柄的位置上。