Low friction coatings for dynamically engaging load bearing...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 28/02 (2006.01) B05D 5/08 (2006.01) E21B 34/02 (2006.01) F16K 3/02 (2006.01)

Patent

CA 2672483

A gate valve (11) has a body (13), the body having a cavity and a flow passage (15) intersecting the cavity. A seat ring (21) is mounted to the body at the intersection of the flow passage and the cavity, the seat ring having an engaging face (25). A gate (17) in the cavity has an engaging face that slidingly engages the face of the seat ring while being moved between open and closed positions. A friction-resistant coating is on at least one of the faces.

L'invention concerne un robinet-vanne (11) présentant un corps, le corps présentant une cavité et un passage d'écoulement (15) coupant la cavité. Une bague de siège (21) est montée sur le corps à l'intersection du passage d'écoulement et de la cavité, la bague de siège présentant une face de contact (25). Un opercule (17) dans la cavité présente une face de contact qui vient en contact coulissant avec la face de la bague de siège tout en étant déplacé entre les positions ouverte et fermée. Un revêtement résistant au frottement est déposé sur au moins une des faces.

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