Orifice fitting seal assembly
First Claim
1. In an orifice fitting mechanism for use in controlled metering of fluids and having a body structure defining a flow passage and opposed spaced sealing surfaces surrounding said flow passages, forming a continuous conduit and supporting an apertured orifice plate in the flow passage, the improvement comprising:
- (a) a pair of internal seal rings cooperating to define a plate receptacle within which said orifice plate is positioned said internal seal rings each defining peripheral locking means;
(b) external locking means surrounding said internal seal rings and retaining said internal seal rings in assembly;
(c) first seal means for establishing sealed relation between said internal seal rings and said orifice plate;
(d) second seal means for establishing sealed relation between said internal seal rings and said sealing surfaces of said body structure; and
(e) each of said internal seal rings being formed to define pressure relief passage means extending from said plate receptacle to an outer portion of said internal seal rings.
1 Assignment
0 Petitions
Accused Products
Abstract
An orifice fitting seal assembly is provided for use in an orifice fitting having a body structure defining a flow passage and opposed spaced sealing surfaces surrounding the flow passage. The improvement comprises a pair of internal seal rings of symmetrical configuration which cooperate to define a plate receptacle within which an apertured orifice plate is positioned. Each of the internal seal rings defines peripheral locking flanges that are disposed in spaced relation when the rings are in assembly. An external locking ring surrounds the assembled internal seal rings and establishes locking engagement therewith to retain the internal seal rings and the orifice plate in assembly. A pair of inner O-ring type sealing elements are retained within internal sealed grooves defined by each of the internal seal rings and the orifice plate. A pair of outer O-ring sealing elements are retained within outer modified dovetail grooves in each of the internal seal rings and serve to establish sealing engagement with the spaced sealing surfaces of the body structure. The orifice plate assembly is vented by vent passages from the back of the outer dovetail grooves to the exterior of the internal seal rings to enable relief of trapped gasses.
35 Citations
15 Claims
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1. In an orifice fitting mechanism for use in controlled metering of fluids and having a body structure defining a flow passage and opposed spaced sealing surfaces surrounding said flow passages, forming a continuous conduit and supporting an apertured orifice plate in the flow passage, the improvement comprising:
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(a) a pair of internal seal rings cooperating to define a plate receptacle within which said orifice plate is positioned said internal seal rings each defining peripheral locking means; (b) external locking means surrounding said internal seal rings and retaining said internal seal rings in assembly; (c) first seal means for establishing sealed relation between said internal seal rings and said orifice plate; (d) second seal means for establishing sealed relation between said internal seal rings and said sealing surfaces of said body structure; and (e) each of said internal seal rings being formed to define pressure relief passage means extending from said plate receptacle to an outer portion of said internal seal rings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In an orifice fitting mechanism for use in controlled metering of fluids and having a body structure defining a flow passage and opposed spaced sealing surfaces surrounding said flow passages, forming a continuous conduit and supporting an apertured orifice plate in the flow passage, the improvement comprising:
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(a) a pair of internal seal rings cooperating to define a plate receptacle within which said orifice plate is positioned, said internal seal rings each defining locking means; (b) locking means retaining said internal seal rings in releasable assembly; (c) first seal means positioned for sealing relation between said internal seal rings and said orifice plate; (d) second seal means establishing sealed relation between said internal seal rings and said sealing surfaces of said body structure; and (e) each of said internal seal rings being formed to define pressure relief passage means extending from said plate receptacle to an outer portion of said internal seal rings. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification