Title:
BUTTERFLY VALVE
Document Type and Number:
Japanese Patent JPS5761865
Kind Code:
A
Abstract:
A butterfly valve comprises a closure member 8 having a warped curve periphery pivotably disposed within a tubular body 1. An elastic seal and a cooperating seat are provided on the closure member and tubular body, respectively, or vice versa. At each point of a mean line of seat, a plane T tangent to the seat forms a roughly constant acute angle x of 20 DEG to 30 DEG with a tangent t to the path of the corresponding point of the closure member at the point of contact of the seal and seat.
Inventors:
PIEERU RUI KURISUCHIYAN SHIYAR
Application Number:
JP11152981A
Publication Date:
April 14, 1982
Filing Date:
July 16, 1981
Export Citation:
Assignee:
PONT A MOUSSON
International Classes:
F16K1/226; F16K1/22; (IPC1-7): F16K1/226