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US 5,123,439 AGranted
Valve body ceramic liners
AssigneeIndustrial Ceramics Engineering
InventorKelly B. Powers
Life of this patent
Estimating the term…
Abstract
Valves having a straight bore are fitted with a structurally discrete cylindrical ceramic liners. An additional ceramic insert may be inserted in the interior of the bonnet. The ceramic liner and ceramic insert protect the interior of the valve from abrasive and corrosive fluids flowing through the valve.
Claims33
A ceramic lined valve comprising:
- (a) a non-ceramic valve body having a substantially straight bore with the bore axis extending along the main axis of the valve body, and having a bonnet containing a bore closure actuator means attached to a bore closure means, which closure means can be actuated by the actuator means to advance the closure means into the bore through a bonnet opening extending into the bore from the bonnet;
- and
- (b) a ceramic liner positioned within the bore and coextensive with at least a portion of the inner surface of the valve body in the bore to substantially prevent exposure of said inner surface to fluids within the bore, said liner being cylindrical with a hollow interior and having a longitudinal axis substantially corresponding with the axis of the bore, said liner having a sidewall opening sized and positioned relative to the bonnet opening so as to accommodate advancement of said bore closure means into the interior of the ceramic liner.
A method for bonding a ceramic surface to a metallic surface comprising;
- (a) coating the metallic surface with a fluorocarbon polymer,
- (b) coating the ceramic surface with a fluorocarbon polymer,
- (c) heating at least one of the metallic or ceramic surfaces sufficiently to soften the fluorocarbon polymer,
- (d) pressing the coated ceramic surface and the coated metallic surface adjacent to each other, and
- (e) allowing the fluorocarbon to cool to fuse and form a bonding layer joining the metallic surface and the ceramic surface.
2 more elements
Dependencies are inferred from the claim text.