These valves feature an eccentrically mounted disk and a PTFE or 316 stainless steel seal ring.
这些阀门具有一个偏心安装的磁盘和聚四氟乙烯或316不锈钢密封环。
2
A new returnable actuator disk of metal seal structure butterfly valve was presented, and its principle, force analysis, characteristic of the actuator were discussed as well.
提出了一种双向压金属硬密封蝶阀蝶板可逆回转机构，讨论了可逆回转机构的工作原理、受力分析及特点。
3
Most of the hard disk is fixed hard drive, is permanently seal fixed in the hard disk drives.