F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 49/00 (2006.01) F02B 47/08 (2006.01) F02M 25/07 (2006.01) F16K 31/06 (2006.01) F16K 39/02 (2006.01) F16K 41/10 (2006.01)
Patent
CA 2324502
A bellows valve assembly (11) includes a valve body (13), a bellows housing (39) and a valve actuator (15). The valve body (13) includes an inlet (17), an outlet (19) and a valve seat (29). A valve closure element (25) is engageable with the valve seat (29) to control fluid flow. The valve closure element (25) has a stem (27) that has an upper portion (27b) having an average diameter at least 25 % smaller than the diameter of the lower portion (27a). A pressure balancing bellows assembly (61) divides the bellows housing (39) into a first chamber (69) connected by a passageway (67) to the fluid passage downstream of the seat (29) and a second chamber (55) connected by a passageway (65) to the fluid passage upstream of the valve seat (29).
La présente invention concerne un ensemble soupape à soufflet (11) comprenant un corps (13), un carter de soufflet (39) et un poussoir (15). Le corps (13) comporte une entrée (17), une sortie (19) et un siège de soupape (29). Un obturateur (25) coopère avec le siège de soupape (29) de façon à réguler le débit de fluide. La tige (27) de l'obturateur (25) comporte une partie supérieure (27b) dont le diamètre moyen est au moins 25% inférieur au diamètre de la partie inférieure (27a). Un équilibreur de pression à soufflet (61) divise le carter de soufflet (39) en deux chambres (69, 55). Un canal (67) relie la première chambre (69) au passage de fluide en aval du siège de soupape (29). Un canal (65) relie la seconde chambre (55) au passage de fluide en amont du siège de soupape (29).
Borden Ladner Gervais Llp
Robertshaw Controls Company
LandOfFree
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