Patent ID: 6029949
Filing Date: 2000-02-29
Classification: F16K

Abstract:
A high performance butterfly valve comprising:a valve body having a substantially circular bore, said bore being adapted for the fluid flow through said bore and having a centerline through said bore;a disk adapted for movement between an open position thereby allowing fluid flow through said circular bore and a closed position wherein fluid flow through said circular bore is restricted, said disk having the share of a diagonal cross-section of a round rod and having an outer face and an inner face, said outer face having a peripheral edge, at least a portion of the circumference of said peripheral edge being notched, said inner face being adapted for mounting said disk in said circular bore, said disk having a centerline corresponding to the centerline of said bore;an annular valve seat mounted in said valve body thereby providing a sealing surface extending into said circular bore for sealing said disk when said disk is in a closed position; and,a shaft for mounting said disk in said circular bore and for rotating said disk between open and closed positions, said shaft having a centerline corresponding to the center of rotation of said disk, said centerline of said shaft being offset from said centerline of said bore and said disk.