国产欧美日韩在线精品_一级a性色生活片无码毛片_78m国产一区在线播放视频_亚洲一区二区综合另类_免费观看成人久久网免费观看_日韩精品第十八页_亚洲乱亚洲乱妇67194老熟妇_黄色视频网站ap_男人边吃奶边做好爽视频免费_男男腐大尺度无码激情av

Method of judging internal leakage of natural gas ball valve

Release time：2025-01-03 Click：

Fixed shaft ball valve is commonly used on natural gas pipelines, and its general inspection method is: turn the valve to the fully open or fully closed position, and check whether there is leakage through the discharge of the valve body drain nozzle. If it can be drained clean, it proves that the seal is good. If there is always pressure discharge, the valve can be considered to be leaking, and the valve should be treated accordingly.

Home
Products
Industry
Tel