High pressure valve

摘要

A high pressure rotary valve including a housing with inlet and outlet openings and a rotor and blade assembly within the housing for moving flowable solid material through the valve. The chamber containing the rotor assembly is defined between a pair of shrouds which move relative to a wall portion of the housing. The periphery of each shroud is ground and hard coated and this periphery is engaged by a first lip seal or multiple thereof supported by the housing. An end plate is located around the rotor shaft at each end of the housing and second lip seals engage ground and hard coated surfaces of the rotor shaft. Pockets defined between the shrouds and the end plates are adapted to be pressurized to create a back pressure resisting movement of material out of the housing chamber in the direction of the rotor shaft. Angular contact bearings support the rotating shaft with respect to the housing.