Trim insert for choke assembly

F - Mech Eng,Light,Heat,Weapons – 16 – K

Patent

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Details

F16K 51/00 (2006.01) F16K 1/42 (2006.01) F16K 47/00 (2006.01) F16L 7/00 (2006.01)

Patent

CA 2574100

A trim insert for a choke assembly is disclosed, wherein the trim insert is a tubular member with a substantially constant inner diameter. A first end of the device is positioned within an adjacent upstream sleeve and a second end is sealingly retained within the discharge channel of the choke assembly. A flange coaxially retains the tubular member between the sleeve and a shoulder of the choke body. The trim insert is made of an erosion resistant material, such as tungsten carbide, hardened steel, or a ceramic. Additionally, the inner surface of the tubular member may be coated with a hardening compound to provide additional erosion resistance.

L'invention concerne une duse rapportée pour un ensemble formant duse, se composant d'un élément tubulaire à diamètre intérieur sensiblement constant. Une première extrémité du dispositif se trouve dans une gaine d'amont adjacente et une seconde extrémité est maintenue de manière étanche dans le canal de décharge de l'ensemble duse. Une bride maintient coaxialement l'élément tubulaire entre la gaine et un épaulement du corps de la duse. La garniture rapportée se compose d'un matériau résistant à l'érosion, tel que le carbure de tungstène, de l'acier trempé ou une céramique. De plus, la surface intérieure de l'élément tubulaire peut être enduite d'un composé durcissant afin d'augmenter la résistance à l'érosion.

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