F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/45
F16K 5/00 (2006.01) F16K 5/06 (2006.01)
Patent
CA 1108589
ABSTRACT OF THE DISCLOSURE A Fire Safe Seal for a valve having a metallic seat ring slidable in a cylindrical internal surface with an elastomer ring sealing between the seat ring and the internal surface. An elastomer seal ring or even a highly finished surface on the lead- ing face effects a seal with the valve closure member. An emer- gency seal ring having a forwardly extending, sharp annular lip with an internal chamfer is engageable, when forced, over a complementary chamfer around the trailing end of the seat ring and into the clearance around the seat ring to seal it off. A spacer ring of a heat destructible material is interposed between the emergency seal ring and the seat ring to render the emergency ring inactive normally.
328898
Cazzaniga Italo
Pasquinelli Ottorino
Gowling Lafleur Henderson Llp
Grove Valve And Regulator Company
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