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.
Claims14
A valve, comprising:
- a rotatable housing having a duct adapted to receive a gas;
- an outer housing ring seal;
- a 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.
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.
A regenerative thermal oxidizer for processing a gas, comprising:
- a combustion zone;
- a first heat exchange bed containing heat exchange media and in communication with said combustion zone;
- a second heat exchange bed containing heat exchange media and in communication with said combustion zone;
- a rotatable switch valve for alternating the flow of said gas between said first and second heat exchange beds, said rotatable switch valve comprising a radial duct, an outer housing, and a ring seal in fluid communication with said radial duct, said ring seal having a bore adapted to allow gas flow to or from said radial duct and form a pressurized seal with said outer 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.
Dependencies are inferred from the claim text.