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A multiple port refrigeration circuit valve uses a valve head mounted upon a threaded stem to selectively control fluid flow through the valve. While the valve housing is formed of a plurality of parts assembled by heating the construction of the valve head permits an elastomeric seal to be used in

A multiple port refrigeration circuit valve uses a valve head mounted upon a threaded stem to selectively control fluid flow through the valve. While the valve housing is formed of a plurality of parts assembled by heating the construction of the valve head permits an elastomeric seal to be used in combination with metal seal surfaces, and the use of the elastomer eliminates leakage and reduces the torque required to form an effective seal.

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A two-way refrigeration valve comprising, in combination, a metal body having an axis, first and second ends and a central region, a chamber defined within said body central region, a threaded bore coaxially defined in said body second end intersecting said chamber, a metal adapter coaxially brazed

A two-way refrigeration valve comprising, in combination, a metal body having an axis, first and second ends and a central region, a chamber defined within said body central region, a threaded bore coaxially defined in said body second end intersecting said chamber, a metal adapter coaxially brazed to said body part first end having an exterior surface, conventional fitting attachment means defined on said adapter exterior surface, said adapter directly communicating with said chamber and partially defining said chamber, a first port defined in said adapter in communication with said chamber at a first location, a second port defined in said body central region in communication with said chamber at a second location spaced from said first location, a third port defined in said body in communication with said chamber at a third location spaced from said first and second locations, said chamber having an axis coaxial with said body axis, a first conical metal chamber sealing surface defined on said body concentrically related to said chamber axis, a second conical metal chamber sealing surface define don said adapter concentrically related to said chamber axis in axially spaced opposed relation to said first sealing surface, said sealing surfaces partially defining said chamber and converging in a direction away from each other, said first and third locations intersecting said first and second sealing surfaces, respectively, said second location intersecting said chamber intermediate said first and second sealing surfaces, a valve member having a threaded stem received within said body threaded bore, said valve member including a head located within said chamber linearly movable substantially parallel to said chamber axis upon rotation of said stem, said valve head including a central portion having a central general plane substantially perpendicular to said chamber axis, first and second metal sealing surfaces defined on said head on opposite sides of said plane in opposed relation to said first and second chamber sealing surfaces, respectively, whereby said first head sealing surface is adapted to selectively engage with said first chamber sealing surface at one axial position of said valve head and said second head sealing surface is adapted to selectively engage with said second chamber sealing surface at a second axial position of said valve head, and an annular elastomeric seal band circumscribing said valve head central portion and radially extending beyond said first and second valve head sealing surfaces and axially extending beyond the adjacent projection of said sealing surfaces adapted to selectively sealingly engage with said first and second chamber seal surfaces prior to engagement of said first chamber and valve head sealing surfaces and said second chamber and valve head sealing surfaces, respectively.