Title:
バタフライ・バルブ
Document Type and Number:
Japanese Patent JP2006514232
Kind Code:
A
Abstract:
A valve having improved inherent flow characteristics and improved dynamic torque characteristics is provided. The valve includes a disk for controlling fluid flow inside the valve. The disk has at least a sealing surface for sealing with a valve seal when the disk is in a closed position. The sealing surface includes a contour and creates a flow clearance with the valve seal as the disk pivots from a closed position toward an open position. A radius of curvature of the contour defines a size of the flow clearance at predetermined disk positions to characterize flow through the valve. The valve can further include an upstream indentation for dynamic torque reduction and/or an indentation for dynamic torque reduction in case of a fluid flow reversal.
Inventors:
Depenning, Charles, Elle.
Ralston, Donald, Gee.
Baumann, Hans, Dee.
Ralston, Donald, Gee.
Baumann, Hans, Dee.
Application Number:
JP2004568027A
Publication Date:
April 27, 2006
Filing Date:
December 15, 2003
Export Citation:
Assignee:
Fisher Controls International Limited Liability Company
International Classes:
F16K1/22
Domestic Patent References:
| JPS61278667A | 1986-12-09 | |||
| JPH02118288A | 1990-05-02 | |||
| JPH04337167A | 1992-11-25 | |||
| JPH09170665A | 1997-06-30 |
Foreign References:
| US4712768A | 1987-12-15 | |||
| US5465756A | 1995-11-14 | |||
| US4296915A | 1981-10-27 | |||
| US4175578A | 1979-11-27 | |||
| US3677297A | 1972-07-18 | |||
| US3945398A | 1976-03-23 | |||
| FR2202245A1 | 1974-05-03 | |||
| AT85598B | 1921-09-26 |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Katsuichi Nishimoto
Kato Kazunori
Katsuichi Nishimoto