The widely used valve stem of the telescopic welded bellows

Writer： admin Time：2021-10-14 22:41 Browse：℃

The widely used valve stem of the telescopic welded bellows vacuum valve is a vacuum bellows stop valve with a linear movement of the valve stem. Gate valves are subject to greater restrictions, but for large diameters, ball valves, plunger valves and butterfly valves are also available. The plug valve used as a vacuum valve has not been promoted because the plug valve needs to be lubricated with oil, so that oil vapor may enter the vacuum system, which is not allowed."