Title:
PLUG VALVE
Document Type and Number:
Japanese Patent JPS52122927
Kind Code:
A
Abstract:
A valve, of the type employing a plug rotatable through substantially 90 DEG between open and closed valve positions, employs a plug which has an elongated configuration along its axis of rotation with the opposing ends of said elongated plug each exhibiting a spherical, ellipsoidal, or other curved configuration that merges smoothly into the elongated sides of the plug. The plug is provided with a passageway which is elongated in the direction of elongation of the plug and which extends through the plug in a direction transverse to the axis of rotation of the plug. The plug surface is sealed relative to the valve housing by at least one continuous seat of elongated closed loop configuration which engages the surface of the plug along a continuous noncircular line or band having a direction of elongation extending generally in the same direction as the central axis of the plug. The valving and sealing functions of the improved valve are similar to those of a conventional spherical ball valve, but achieve a given port area by use of a plug having a smaller cross section relative to the turning axis, than would be required of a ball exhibiting that port area.
Inventors:
RUISU HANTO NORISU
CHIYAARUZU HENRII DAIKU
CHIYAARUZU HENRII DAIKU
Application Number:
JP3861677A
Publication Date:
October 15, 1977
Filing Date:
April 06, 1977
Export Citation:
Assignee:
WORCESTER CONTROLS AG
International Classes:
F16K5/02; F16K5/04; F16K5/06; (IPC1-7): F16K5/00