Valve

Claim 2

A valve, comprising a body having a flowway therethrough and a substantially cicumferential weldment thereabout, a closure member mounted in the body for movement between positions opening and closing the flowway, a heat destructible part captured within and engaging the body near and generally concentric with the weldment, means providing an annular passageway within the body which is Generally concentric with the weldment and includes walls on said body which are spaced from the weldment and relatively near the heat desctructible part, and means including a pair of circumferentially spaced apart ports connecting said annular passageway with the exterior of said body to permit coolant to be circulated through said passageway in order to reduce the transmission of heat to said part during formation of the weldment.

Claim 3

A valve of the character defined in claim 1, wherein said part comprises a seal ring.

Claim 4

A valve of the character defined in claim 1, wherein said part comprises a metal spring.

Claim 5

A valve, comprising a body having a flowway therethrough, a closure member mounted in the body for movement between positions opening and closing the flowway, an annular seat captured within the body and engaging one side of the closure member, annular seal means engaging the seat and body, said body having an annular weldment near and generally concentric with the seal means, means providing an annular passageway within the body which is generally concentric with the weldment and the seal means and includes walls on said body which are generally intermediate said weldment and seal means, and means including a pair of circumferentially spaced apart ports connecting said annular passageway with the exterior of said body to permit coolant to be circulated through said passageway.

Claim 6

A valve, comprising a body having a flowway therethrough, a closure member mounted in the body for movement between positions opening and closing the flowway, an annular seat captured within the body and engaging one side of the closure member, annular seal means engaging the seat and body, said body having an annular weldment near and generally concentric with the seal means, means providing an annular passageway within the body which is generally concentric with the weldment and the seal means and includes walls on said body which are generally intermediate said weldment and seal means, and means including a pair of circumferentially spaced apart ports connecting said annular passageway with the exterior of said body to permit coolant to be circulated through said passageway.

Claim 7

A valve of the character defined in claim 4, wherein said seat includes a seal ring on its inner end for engaging the closure member, and a port connecting the passageway with the inner end of the seat adjacent said seal ring to pass lubricant introduced through the connecting means after formation of the weldment.

Claim 8

A valve, comprising a body including an intermediate portion welded to an end portion to form a flowway therethrough, a closure member mounted in the intermediate body portion for movement between positions opening and closing the flowway, an annular seat captured within the end body portion for engaging one side of the closure member, annular seal means engaging the seat and the body end portion, means providing an annular passageway within the body including walls on said body end portion which are generally intermediate said weldment and seal means, and means including a pair of circumferentially spaced apart ports connecting said annular passageway with the exterior of said body to permit coolant to be circulated through said passageway.

Claim 9

A valve, comprising a body including an intermediate portion welded to an end portion to form a flowway therethrough, a closure member mounted in the intermediate body portion for movement between positions opening and closing the flowway, an annular seat captured within the end body portion for engaging one side of the closure member, annular seal means engaging the seat and the body end portion, means providing an annular passageway within the body including walls on said body end portion which are generally intermediate said weldment and seal means, and means including a pair of circumferentially spaced apart ports connecting said annular passageway with the exterior of said body to permit coolant to be circulated through said passageway.

Claim 10

A valve of the character defined in claim 6, including an annular metal spring engaging the body end portion and seat to urge the seat toward the closure member and having one side which forms a wall of said annular passageway.

Claim 11

In a method of manufacturing a valve having parts which include a body, a closure member mounted in the body for opening and closing a flowway therethrough, an annular seat captured within the body for engaging a side of the closure member, and seal means adapted to engage the body and seat, and wherein a weldment is to be formed about the body near the seal means, the steps of forming the parts of the valve in such a manner that, upon their assembly and prior to formation of the weldment, they define an annular passageway in the body which includes walls generally intermediate and in heat conductive relation with the weldment and seal means, and circulating a coolant through the passageway during formation of said weldment.

Claim 12

In a method of manufacturing a valve having parts which include a body, a closure member mounted in the body for opening and closing a flowway therethrough, an annular seat captured within the body for engaging a side of the closure member, and seal means adapted to engage the body and seat, and wherein a weldment is to be formed about the body near the seal means, the steps of forming the parts of the valve in such a manner that, upon their assembly and prior to formation of the weldment, they define an annular passageway in the body which includes walls generally intermediate and in heat conductive relation with the weldment and seal means, and circulating a coolant through the passageway during formation of said weldment.

Claim 13

In a method of manufacturing a valve having parts which include a body having intermediate and end portions, a closure member adapted to be mounted in the intermediate portion; a seat adapted to be captured in the end body portion for engaging a side of the closure member, and seal means to engage the seat and the end body portion, and wherein adjacent surfaces of the intermediate and end portions are to be joined by a weldment, the steps of forming the parts of the valve in such a manner that, with the seat captured in the end body portion and the seal Means engaging the seat and end body portion, and upon disposal of the body portions with their adjacent surfaces in position to be joined, said parts define an annular passageway in the body which includes walls generally intermediate and in heat conductive relation with said surfaces and seal means, circulating coolant through said passageway, and forming said weldment during the circulation of said coolant.

Claim 14

In a method of manufacturing a valve having parts which include a body having intermediate and end portions, a closure member adapted to be mounted in the intermediate portion; a seat adapted to be captured in the end body portion for engaging a side of the closure member, and seal means to engage the seat and the end body portion, and wherein adjacent surfaces of the intermediate and end portions are to be joined by a weldment, the steps of forming the parts of the valve in such a manner that, with the seat captured in the end body portion and the seal Means engaging the seat and end body portion, and upon disposal of the body portions with their adjacent surfaces in position to be joined, said parts define an annular passageway in the body which includes walls generally intermediate and in heat conductive relation with said surfaces and seal means, circulating coolant through said passageway, and forming said weldment during the circulation of said coolant.

Claim 15

In a method of the character defined in claim 9, wherein the body parts also include a metal spring for engaging the seat and body to urge the seat against the closure member, and said spring is so formed and assembled as to provide a wall of said annular passageway.