The metal-coated gasket is made of high-quality metal tape and other alloy materials and graphite, asbestos, polytetrafluoroethylene, non-asbestos and other soft materials alternately overlapped and spirally wound. The metal tape is fixed by spot welding at the beginning and the end .
Metal-clad gaskets are the most resilient among semi-metallic gaskets. The structure density of metal-clad gaskets can be made according to different locking force requirements, and the inner and outer steel rings are used to control the maximum compression. , The surface accuracy of the flange sealing surface contacted by the metal-clad gasket is not high.
Metal coated gaskets are especially suitable for occasions where the load is uneven, the joining force is easy to relax, the temperature and pressure change periodically, and there is impact or vibration. Spiral wound gaskets are static sealing elements for flange connection processing such as valves, pumps, heat exchangers, towers, manholes, and hand holes.
Metal coated gaskets are divided into 4 categories:
The basic metal-clad gasket is also called A-type metal-clad gasket. Only one sealing surface is composed of a v or w-shaped metal steel strip and a non-metallic filling.
Metal-coated gasket with inner ring is also called B-type metal-coated gasket and inner-reinforced metal-coated gasket, which is composed of an inner ring on the basis of the basic type.
Metal-coated gaskets with outer ring are also called C-type metal-coated gaskets and outer-reinforced metal-coated gaskets, which are based on the basic type and add an outer ring.
Metal-coated gaskets with inner and outer rings are also called D-type metal-coated gaskets and inner and outer reinforced metal-coated gaskets, which are composed of the basic type and the inner and outer rings.
Introduction to the characteristics of metal-clad gaskets and application scope: flange connection of pipelines, valves, pressure vessels, condensers, heat exchangers, towers, manholes, hand holes, etc. in petroleum, chemical, metallurgy, electric power, shipbuilding, machinery and other industries Seal at the place.
