US 4,288,032 AGranted

Steam trap including interchangeable body member and insert assembly

AssigneeYarway Corporation

InventorHeinz K. Hetz

Life of this patent

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Abstract

A valve body member and various insert assemblies usable with the body member to form steam traps of different types are disclosed in this application. The body member includes an internally threaded, generally cylindrical recess extending inwardly from an outer surface and terminating in an end face, an inlet passage communicating with the recess thrugh a passageway terminating in the end face of the recess, and a discharge passage also communicating with the recess. An annular rib is formed on the end face of the recess around the passageway and includes a surface on which is seated a first sealing ring clamped in place by a first bearing surface of the particular insert assembly used to form the steam trap; an annular seat is formed on the outer surface of the body member around the cylindrical recess and this seat receives a second sealing ring which is clamped in place by a second bearing surface of the insert assembly. All of the insert assemblies further include a threaded portion that cooperates with the internally threaded portion of the recess to retain the insert assembly and the body member in assembled relationship. Certain of the insert assemblies include a plurality of parts which are retained in assembled relationship by a retaining ring arrangement to facilitate assembly and disassembly of the insert assembly and the body member and all of the insert assemblies are arranged to retain the first sealing ring adjacent the first bearing surface to facilitate removal and insertion of the first sealing ring on the annular rib.

Claims15

Dependent claims

A steam trap comprising a body member and an insert assembly;

said body member including a generally cylindrical recess extending inwardly from an outer surface thereof and terminating in an end face, said recess being formed with a threaded portion extending from adjacent said outer surface and terminating at a point spaced from said end face such that an unthreaded portion is formed between said threaded portion and said end face, said threaded portion and said unthreaded portion having a substantially uniform diameter, inlet and outlet passage means communicating with said recess, said inlet passage means including a passageway terminating in said end face of said recess, said outlet passage means including a passageway terminating in said unthreaded portion and said face of said recess, a seat formed in said outer surface of said body member and extending about said recess, and an annular rib formed on said end face around said inlet passageway, said annular rib having a seating surface located in said recess and spaced from said end face thereof;
said insert assembly including means for preventing the flow of steam from said inlet passage means to said outlet passage means and for allowing the flow of condensate from said inlet passage means to said outlet passage means, said insert assembly further including a threaded portion engaged with said threaded portion of said recess for retaining said body member and said insert assembly in assembled relationship, first and second bearing surfaces included in said insert assembly, said first bearing surface being located in said recess adjacent said end face thereof and said second bearing surface being located externally of said body member adjacent said seat in said outer surface thereof;
a first sealing ring clamped between said first bearing surface and said seating surface on said rib and a second sealing ring clamped between said second bearing surface and said seat in said outer surface of said body member.

A steam trap comprising a body member and an insert assembly;

said body member including a generally cylindrical recess including a threaded portion extending inwardly from an outer surface thereof and terminating in an end face, inlet and outlet passage means communicating with said recess, said inlet passage means including a passageway terminating in said end face of said recess, an annular rib formed on said end face and extending around said passageway, said rib having a seating surface located in said recess and spaced from said end face;
said insert assembly including means for preventing the flow of steam from said inlet passage means to said outlet passage means and for allowing the flow of condensate from said inlet passage means to said outlet passage means, said insert assembly further including a threaded portion engaged with said threaded portion of said recess for retaining said body member and said insert assembly in assembled relationship, a first bearing surface included in said insert assembly, said first bearing surface being adjacent said end face of said recess;
a first sealing ring located between said first bearing surface and said seating surface and being clamped in place when said steam trap is assembled;
said insert assembly further including a skirt extending from said first bearing surface beyond said seating surface and terminating radially adjacent said annular rib, said skirt including means for retaining said first sealing ring with said insert assembly during assembly and disassembly of said steam trap.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 05/829,008Filed 30 Aug 1977 · continuation in part
Priority: 6 Nov 1975
Granted: 8 Sep 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F16T 1/165
Involving a high-pressure chamber and a low-pressure chamber communicating with one another, i.e. thermodynamic steam chambers: of disc type
F16T 1/10
With valves controlled thermally: by thermally-expansible liquids
Y10T 137/304
Discriminating outlet for liquid: with fluid responsive valve
Y10T 137/5109
Fluid handling: convertible