Slide gate valve
AssigneeSchubert & Salzer
InventorJurgen Balz
Life of this patent
Estimating the term…
Abstract
A slide gate valve having a flangeless housing clamped between the ends of two pipelines which housing has an inner chamber, enlarged between the ends of the pipelines, for accommodating a stationary valve plate. An associated displaceable valve plate is provided with an annular insert having approximately the same inside diameter as the adjacent pipeline on the discharge side in the housing, against which insert the stationary valve plate is supported as a seal in a small annular area opposite the sealing surface between the insert and the pipeline. The remaining area of the stationary valve plate is free of support from both the insert and the housing.
Claims13
A slide gate valve for pipeline, comprising:
- (a) a stationary valve plate;
- (b) a displaceable valve plate associated with said stationary plate;
- (c) a flangeless housing adapted for being clamped between the ends of two pipelines, said housing having an inner chamber which is axially enlarged between the two pipeline ends for accommodating said stationary and displaceable valve plates, and slightly radially enlarged on a discharge side thereof for receiving said plates, but having an inside diameter on an inlet side thereof substantially the same as that of the adjacent pipeline end;
- and
- (d) an annular insert having substantially the same inside diameter as an adjacent pipeline, said insert being provided on a discharge side within said flangeless housing, having a pipeline sealing surface between itself and said adjacent pipeline, said a plate sealing surface between itself and said stationary plate, said plate sealing surface having a substantially smaller area than said pipeline sealing surface so as to reduce forces transmitted to said stationary plate through said insert during on-site clamping of said housing between the ends of two pipelines;
- wherein
- said stationary plate is supported against said insert as a seal in a small annular area of said stationary plate in contact with said plate sealing surface, and further wherein the remaining area of said stationary valve plate and said insert define a clearance therebetween.
A slide gate valve for placement between adjacent ends of two pipelines, comprising:
- a first valve plate;
- a second valve plate disposed adjacent said first valve plate;
- a flangeless housing adapted to be received between said adjacent ends of said two pipelines, said housing defining a chamber for receiving said first and second valve plates, said chamber having an inlet-side inside diameter the same as that of the adjacent pipeline;
- and
- an insert disposed within said chamber on a discharge side thereof, said insert having surfaces on opposite axial sides thereof, one of said surfaces being faced by a side surface of one of said valve plates and contacting a portion of same to support and seal such plate, and the other of said surfaces facing one of said pipeline ends so as to seal said one pipeline end, said one of said insert surfaces being smaller than said other of said insert surfaces, wherein said insert and the remaining portion of said side surface of said one valve plate contacted by said insert defined a clearance therebetween.
Dependencies are inferred from the claim text.