stem seal

基本解釋

Describing several structures of stem seal and existent problems.
闡述了閥桿密封的幾種結(jié)搆及存在的問題。
The backup seal is secondary to the main stem seal assembly (20) in the bonnet (12).
備用密封件是閥帽（12）內(nèi)主閥桿密封組件（20）的二級(jí)密封。
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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.
電站鍋爐給水調(diào)節(jié)閥的閥桿密封採(cǎi)用柔性石墨填料，既降低了摩擦力，又爲(wèi)調(diào)節(jié)閥的運(yùn)行節(jié)約了能源。