Valve bonnet cooling system

Claim 2

An improved valve structure for controlling the flow of high temperature fluids at least in part in vapor form of the type having; a valve body, a valve bonnet on said body, a valve stem extending through the valve bonnet to the valve body, and valve stem packing in the valve bonnet disposed about the stem, wherein the improvement comprises: a narrow passage in said bonnet along and about said valve stem; a dead end pocket structure beside said narrow passage and separated therefrom; and a condensing chamber open to both said passage and said pocket, said condensing chamber being located between said valve stem packing and one end of said passage.

Claim 3

An improved valve structure for controlling the flow of high temperature fluids at least in part in vapor form of the type having; a valve body, a valve bonnet on said body, a valve stem extending through the valve bonnet to the valve body, and valve stem packing in the valve bonnet disposed about the stem, wherein the improvement comprises: a narrow passage in said bonnet along and about said valve stem; a dead end pocket structure beside said narrow passage and separated therefrom; and a condensing chamber open to both said passage and said pocket, said condensing chamber being located between said valve stem packing and one end of said passage.

Claim 4

An improved valve structure for controlling the flow of high temperature fluids at least in part in vapor form of the type having; a valve body, a valve bonnet on said body, a valve stem extending through the valve bonnet to the valve body, and valve stem packing in the valve bonnet disposed about the stem, wherein the improvement comprises: a narrow passage in said bonnet along and about said valve stem; a dead end pocket structure beside said narrow passage and separated therefrom; and a condensing chamber open to both said passage and said pocket, said condensing chamber being located between said valve stem packing and one end of said passage.

Claim 5

A valve structure according to claim 1, wherein: said dead-end pocket structure includes a series of pockets along said valve stem.

Claim 6

A valve structure according to claim 1, wherein: said dead-end pocket structure includes a single pocket extending a significant distance along said valve stem.

Claim 7

A valve structure according to claim 1, wherein: said dead-end pocket structure includes a single pocket extending a significant distance along said valve stem, and a filter-like body of fibrous material in said single pocket.

Claim 8

A valve structure according to claim 1, wherein: a filter-like body of fibrous material is contained in said dead-end pocket.

Claim 9

A valve structure according to claim 1, wherein: a body of steel wool is contained in said dead end pocket.

Claim 10

A valve structure according to claim 1, wherein: said dead-end pocket structure includes a single pocket extending a significant distance along said valve stem, and a body of steel wool in said single pocket.

Claim 11

A valve structure according to claim 1, wherein: a sleeve member is mounted about and along said valve stem to essentially define said narrow passage and said dead-end pocket.

Claim 12

A valve structure according to claim 1, wherein: A stacked column of ring baffles is mounted about and along said valve stem to essentially define said narrow passage and said dead end pocket structure.

Claim 13

A valve structure according to claim 1, wherein: a body of heat conductive filter-like material is located in said pocket structure, with one of its functions embodied in heat transfer transversely from the area of the valve stem to the inner wall of said inversion structure.

Claim 14

A valve structure according to claim 1, wherein: said pocket structure is formed by a stacked column of ring baffles, with one of the functions of said baffles embodied in heat transfer transversely from the area of the valve stem to the inner wall of said inversion structure.

Claim 15

In a high temperature flow control valve, the improvement comprising: an expansion chamber about the stem of said valve for receiving and condensing steam flow along such valve stem; and a dead end chamber open to said expansion chamber and located between said expansion chamber and the body of the valve, for trapping condensate from said chamber and preventing circulation of steam along such valve stem.

Claim 16

In a high temperature flow control valve, the improvement comprising: an expansion chamber about the stem of said valve for receiving and condensing steam flow along such valve stem; and a dead end chamber open to said expansion chamber and located between said expansion chamber and the body of the valve, for trapping condensate from said chamber and preventing circulation of steam along such valve stem.

Claim 17

A valve bonnet cooling unit comprising: an outer sleeve for containing a valve stem; and an inner sleeve, contained by said outer sleeve and also for containing such valve stem; said inner sleeve extending from a point adjacent the valve body end of said outer sleeve to a point significantly short of the other end of said outer sleeve.

Claim 18

A valve bonnet cooling unit comprising: an outer sleeve for containing a valve stem; and an inner sleeve, contained by said outer sleeve and also for containing such valve stem; said inner sleeve extending from a point adjacent the valve body end of said outer sleeve to a point significantly short of the other end of said outer sleeve.

Claim 19

A cooling unit according to claim 13, wherein: said inner sleeve is defined by the inner peripheries of a stacked column of ring baffles.

Claim 20

A cooling unit according to claim 13, wherein: said cooling unit is integral with a valve bonnet.

Claim 21

A cooling unit according to claim 13, wherein: said coOling unit is a separate body, mounted between a valve body and a valve bonnet.

Claim 22

In a valve assembly for use in hot fluid applications including means for inhibiting hot fluid circulation along the valve stem, the improvement comprising: a sleeve member within said assembly containing a partial length of such valve stem to form an elongate narrow sleeve channel along such partial length, and means disposed about said sleeve member for trapping a body of condensate located beyond said partial length of such valve stem.

Claim 23

In a valve assembly for use in hot fluid applications including means for inhibiting hot fluid circulation along the valve stem, the improvement comprising: a sleeve member within said assembly containing a partial length of such valve stem to form an elongate narrow sleeve channel along such partial length, and means disposed about said sleeve member for trapping a body of condensate located beyond said partial length of such valve stem.

Claim 24

In bonnet structure for use in a valve for controlling the flow of super heated steam, the improvement comprising: an elongate housing structure having an axial opening therethrough for centrally containing part of the length of a valve stem; a narrowed portion in said opening forming a radially inward extending abutment; a column of valve stem packing disposed in said opening with said abutment as a base; an inner sleeve, concentrically disposed in said opening on the opposite side of said abutment from said packing and extending from that end of said housing structure to a point significantly short of said abutment; a base ring mounted about said inner sleeve at said end of said housing structure and forming a dead end for a portion of said axial opening which is radially outward from said inner sleeve; and a body of steel wool in said dead ended portion of said axial opening; whereby a narrow flow passage is provided within said sleeve along a valve stem in said axial opening into a condensing chamber between the inner end of said sleeve and said abutment, said dead ended portion of said axial opening being open to said condensing chamber.

Claim 25

In bonnet structure for use in a valve for controlling the flow of super heated steam, the improvement comprising: an elongate housing structure having an axial opening therethrough for centrally containing part of the length of a valve stem; a narrowed portion in said opening forming a radially inward extending abutment; a column of valve stem packing disposed in said opening with said abutment as a base; an inner sleeve, concentrically disposed in said opening on the opposite side of said abutment from said packing and extending from that end of said housing structure to a point significantly short of said abutment; a base ring mounted about said inner sleeve at said end of said housing structure and forming a dead end for a portion of said axial opening which is radially outward from said inner sleeve; and a body of steel wool in said dead ended portion of said axial opening; whereby a narrow flow passage is provided within said sleeve along a valve stem in said axial opening into a condensing chamber between the inner end of said sleeve and said abutment, said dead ended portion of said axial opening being open to said condensing chamber.