welded metal bellows and vacuum valves are widely used

Writer： admin Time：2021-10-14 22:37 Browse：℃

welded metal bellows vacuum valves are widely used. Vacuum bellows is widely used as 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. The closing part of the vacuum valve is sealed with a rubber sealing ring or a metal sealing ring. The bellows of the bellows globe valve is made of stainless steel, high-zinc brass JI80, plastic and other materials. The shut-off valve of small diameter (with a diameter of less than 10 mm) can be sealed with a diaphragm. Spherical plug valves can be used for low vacuum and medium vacuum."