Cover plate seals are used as self-sealing gaskets, meaning that the sealing force does not come from bolts but from the internal pressure.
These seals are designed for high pressure applications where the internal pressure within the equipment provides the required compressive forces on the gasket to achieve a positive seal. Flexible graphite is primarily used as a base material which is then compressed in a die to a specific density. Extrusion of the graphite can be prevented by installing formed or machined stainless steel caps to the edges of the seal.
These seals are generally rectangular in cross section shape, but can also be manufactured with bevelled edges on either the inside or outside diameters.
A sealing solution for high performance valve applications which require excellent pressure and temperature characteristics.