Conical metal ring seal coated with soft metal - and used in vacuum valves in nuclear fusion plant

摘要

The ring has parallel and conical top and bottom surfaces and both its bore and outer dia. are coated with a soft metal of specified thickness forming inner and outer layers. The inner layer has a sharp edge on its top rim, whereas the outer layer has a sharp edge on its bottom rim. The ring seal is pref. made from a metal tube which is coated or clad on both its entire bore and outer dia. with a soft metal. The tube is then cut along conical planes which have their apices on the axis of the tube. Used in nuclear fusion plant for valves used in very hard vacuum systems and/or at high or low temps.; or for sealing flanges or in other plant.