Fluid handling – Systems – Multi-way valve unit
Patent
1990-06-13
1991-10-08
Rosenthal, Arnold
Fluid handling
Systems
Multi-way valve unit
1376253, 251208, F16K 4704, F16K 308
Patent
active
050545213
ABSTRACT:
To improve the turn-down ratio and reduce the erosiveness of the discharge flow in a multiple orifice valve having a movable upstream disk and an abutting stationary downstream disk, particularly when the disks are subjected to high fluid pressures, the disks are provided with cooperating fluid conducting openings having a modified circular sector shape. In the preferred embodiment, the modified circular sector shape of the fluid conducting openings includes a primary opening portion formed in the general shape of a circular sector and a secondary opening portion comprising a pair of substantially semicircular supplemental openings, one of the pair of openings being provided at a radially outermost location along a first one of two radially directed walls defining therebetween the central angle of the circular sector shaped primary opening portion, the other of the pair of supplemental openings being provided at a similar location along the second one of the two radially directed walls. The semicircular supplemental openings, when properly aligned to an optimum turn-down position, provide a significantly increased turn-down ratio and low-erosion discharge flow thorugh the downstream disk which is essentially always parallel with a central plane bisecting the fluid conducting openings of the downstream disk and passing through a common central axis of the disks.
REFERENCES:
patent: 3207181 (1965-09-01), Willis
patent: 4098294 (1978-07-01), Woods
patent: 4360040 (1982-11-01), Cove et al.
patent: 4603834 (1986-08-01), Hendrick
patent: 4901977 (1990-02-01), Hendrick
patent: 4903725 (1990-02-01), Ko
patent: 4922950 (1990-05-01), Taylor
patent: 4946134 (1990-08-01), Orlandi
Automatic Control Components, Inc.
Poff Clifford A.
Rosenthal Arnold
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