Butterfly valve having leak detecting means
First Claim
1. An improved butterfly valve having leak detecting means comprising:
- a valve body having a flow passageway therethrough and having coaxial top and bottom shaft openings intersecting the flow passageway, the body having a valve seat therein circumscribing said flow passageway;
a disc having a circumferential sealing surface, the disc being supported in said body fluid passageway in a plane oblique to the axis of said shaft openings in said body, the disc being rotatable between an open position permitting fluid flow through the valve to either side of the disc, and a closed position wherein the disc circumferential sealing surface sealably contacts said valve seat around the full periphery thereof to block flow through said passageway, said valve seat and said disc sealing surface being cooperatively configured to provide two spaced apart, circumferential uninterrupted sealing contacts providing a circumferential valley therebetween;
an upper and a lower shaft portion received in said body shaft openings, one shaft portion being secured to said disc and extending externally of said valve body providing means of positioning the disc, one shaft portion having a passageway therein communicating with the exterior of the valve body, and the disc having a passageway communicating between said circumferential valley and said shaft passageway thereby providing communication between said circumferential valley and the exterior of the valve whereby any fluid leakage past said valve seat and disc sealing surface may be bled to the valve exterior.
2 Assignments
0 Petitions
Accused Products
Abstract
An improved butterfly valve having leak detecting means, the valve body having a flow passageway therethrough, and co-axial top and bottom shaft openings and a seat circumscribing the flow passageway, a disc having an uninterrupted circumferential sealing surface having two spaced apart circumferential sealing contacts providing a circumferential valley therebetween. An upper and lower shaft portion is received in the body shaft openings, one of the shaft portions being secured to the disc providing means of positioning the disc and one of the shaft portions having a passageway therein communicating with the exterior of the valve body, the disc having a passageway communicating with the disc circumferential valley and the shaft passageway so that fluid leakage past either one of the disc sealing contacts will be conducted exteriorly of the body as an indication of loss of valve integrity when the valve is in the closed position.
30 Citations
8 Claims
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1. An improved butterfly valve having leak detecting means comprising:
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a valve body having a flow passageway therethrough and having coaxial top and bottom shaft openings intersecting the flow passageway, the body having a valve seat therein circumscribing said flow passageway; a disc having a circumferential sealing surface, the disc being supported in said body fluid passageway in a plane oblique to the axis of said shaft openings in said body, the disc being rotatable between an open position permitting fluid flow through the valve to either side of the disc, and a closed position wherein the disc circumferential sealing surface sealably contacts said valve seat around the full periphery thereof to block flow through said passageway, said valve seat and said disc sealing surface being cooperatively configured to provide two spaced apart, circumferential uninterrupted sealing contacts providing a circumferential valley therebetween; an upper and a lower shaft portion received in said body shaft openings, one shaft portion being secured to said disc and extending externally of said valve body providing means of positioning the disc, one shaft portion having a passageway therein communicating with the exterior of the valve body, and the disc having a passageway communicating between said circumferential valley and said shaft passageway thereby providing communication between said circumferential valley and the exterior of the valve whereby any fluid leakage past said valve seat and disc sealing surface may be bled to the valve exterior. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification