Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1992-04-14
1994-03-29
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
13753325, 13753329, 137543, F16K 1506
Patent
active
052975797
ABSTRACT:
The plunger of the valve has a semi-spherical valve member of reduced diameter, so that it is inwardly spaced from the ribs of the cage. The plunger is centralized and guided by top and bottom stems attached to the ball and working loosely in apertured webs carried by the cage and seat member. The cage has 2 or 3 ribs only, so that the windows are wider. The cage web is downwardly spaced from the top of the cage, to maximize the area of the cage outlet. The valve member has a reduced diameter neck at its upper end, to keep the valve member downwardly spaced from the cage web when the valve is fully open. As a result of these features the cross-sectional areas of the flow passage through the opened valve are increased. The stems are preferably straight-sided and the web openings are circular so fluid may flush out solids packing between the stems and webs. The valve has been improved to increase flow capacity and ensure line contact seating which can be maintained even though there is wear of the parts.
REFERENCES:
patent: 170974 (1875-12-01), Westwater
patent: 1960970 (1934-05-01), Fina
patent: 2301276 (1942-11-01), Gussick
patent: 2943639 (1960-07-01), Smith
Jensen Douglas A.
McConnell Kenneth R.
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