Switching valve seal
AssigneeMegtec Systems, Inc.
InventorJames T. Cash
Life of this patent
Estimating the term…
Abstract
Switching valve utilizing a rotatable seal suitable for use in a regenerative thermal oxidizer, and oxidizer including the switching valve. The valve of the present invention exhibits excellent sealing characteristics and minimizes wear. The valve has a seal plate that defines two chambers, each chamber being a flow port that leads to one of two regenerative beds of the oxidizer. The valve also includes a switching flow distributor that provides alternate channeling of the inlet or outlet process gas to each half of the seal plate. The valve operates between two modes: a stationary mode and a valve movement mode. In the stationary mode, a tight gas seal is used to minimize or prevent process gas leakage. The gas seal also seals during valve movement.
Claims8
A valve, comprising:
- a rotatable housing having a duct;
- an outer stationary housing ring seal;
- a movable ring seal between said rotatable housing and said outer housing ring seal, said ring seal having a bore adapted to allow gas flow to or from said duct, said ring seal being movable with respect to said outer housing ring seal, said duct and said bore being adapted to receive a pressurized gas for providing a continuous and non-frictional seal between said outer housing ring seal and said ring seal during rotation of said housing.
A valve, comprising:
- a rotatable housing;
- an outer housing ring seal;
- a ring seal between said rotatable housing and said outer housing ring seal;
- and a manifold about said outer housing ring seal supplying pressurized gas about said ring seal to provide a continuous and non-frictional seal between said outer housing ring seal and said ring seal during rotation of said housing.
A rotatable valve for directing the flow of a fluid, comprising:
- a rotatable housing;
- a stationary wall spaced from said rotatable housing and defining with said housing a sealing space;
- seal means positioned between said rotatable housing and said stationary wall in said sealing space, said seal means being adapted to receive a gas in said sealing space and bias against said wall to provide a continuous and non-frictional seal between said stationary wall and said seal means during rotation of said housing.
Dependencies are inferred from the claim text.