Stop valve for high temp. fluids - has valve plate and moving and fixed rings with sealing faces

摘要

The stop valve is used for fluids at high temperatures. The valve flow stopping plate is pivotted about the centre outside the sealing surface. The housing has a ring with two contact faces of conical or spherical shape. The sealing of the valve plate is ensured by the action of the housing ring against the housing and plate sealing rings. The seals are made of nonflexible materials able to withstand high temperatures. The moving housing ring has an inner conical sealing face matching the sealing face of the valve plate. This ring has also external conical sealing face matching sealing face of a fixed housing ring. The moving ring is actuated by hydraulic actuating pins.