阀门密封 meaning in English

valve seal

Before installation should completed clean inner of the pipeline , particles or sundries are not allowed to be contained in the medium to avoid the damage of valve sealing surface
阀门安装前请将管路彻底清洗干净，介质中不能含有颗粒或杂物。以免损伤阀门密封面。
The seat ring uses the sealing face inlaid with ptfe , so has dual seals of ptfe to metal and metal to metal , the ptfe sealingface also acts as removing the dirt on the wedge disc
金属对金属密封的阀门，阀体外部设有注油脂结构，油脂通过注脂器、阀座进入阀门密封面，使阀门达到零泄漏。
For the valve with the metal to metal seal , there is grease injector outside of it , grease gets into the sealing face through the injector and the seat ring to have the valve up to null leak
金属对金属密封的阀门，阀体外部设有注油脂结构，油脂通过注脂器、阀座进入阀门密封面，使阀门达到零泄漏。