Improved automatic recirculation valve

Details Improved automatic recirculation valve Improved automatic recirculation valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 17/04 (2006.01) F04D 15/00 (2006.01) F04D 29/66 (2006.01) G05D 7/01 (2006.01)

Patent

CA 2211146

An automatic recirculation valve (10) having a body portion (12), a central hub (60) integral with said body portion (12) and inlet (16), main outlet (18) and recirculation outlets (20). A main valve element (28) responsive to flow from said inlet (16) to said main outlet (18) includes a hollow stem (42) forming a bypass valve member (32) through which recirculation fluid flows. A shaft guide bushing (56) surrounding the valve stem (42) and bypass adapter (58) in the bypass outlet (20) provides a recirculation fluid passage and imparts a swirling movement to the recirculation fluid exiting the recirculation outlet (20) to protect the valve body (12) and downstream piping from damage.

Une vanne de recirculation automatique (10) comporte une partie carter (12), un moyeu central (60) intégré à ladite partie carter (12) et un orifice d'admission (16), un orifice de sortie principal (18) et des orifices de sortie de recirculation (20). Une vanne principale (28) réagissant au flux allant dudit orifice d'admission (16) audit orifice de sortie principal (18) comporte une tige creuse (42) formant une vanne de dérivation (32) à travers laquelle s'écoule le fluide de recirculation. Une douille de guidage à axe (56) entourant la tige de la vanne (42) et un adaptateur de dérivation (58) dans l'orifice de sortie de dérivation (20) offrent un passage pour le fluide de recirculation et impriment un mouvement tourbillonnaire au fluide de recirculation quittant l'orifice de sortie de recirculation (20) pour éviter que le carter de vanne (12) et la tuyauterie placée en aval ne soient endommagés.

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