Valves and valve actuation – Valve head movably connected for accommodation to seat – With yieldable connection
Patent
1988-05-02
1989-03-28
Chambers, A. Michael
Valves and valve actuation
Valve head movably connected for accommodation to seat
With yieldable connection
251176, 251186, F16K 2500
Patent
active
048156981
ABSTRACT:
A hard seated globe valve assembly for use in servicing high and low temperature fluids. The valve includes a moveable stem attached at one end to a tapered plug of hard material. An equally hard seat having a tapered surface is mounted for mating engagement with the plug when the valve is closed. The seat is located in a partition that separates the globe-shaped body into two chambers having fluid inlet-outlet orifices. An annular ring is mounted between the bearing end of the stem and the plug so that the plug is resiliently engaged in the seat when the valve is closed. It has been found that hard seated valves tend to be difficult to open or lose their sealing abilities when servicing extreme temperature fluids due to the expansion and contraction when the valve is heated and cooled. The resilience of the annular ring prevents this problem by permitting the plug to adjust during expansion and contraction, thus making it easier to open the valve after cooling and precluding loss of sealing during heating.
REFERENCES:
patent: 1034882 (1912-08-01), Crane
patent: 3211419 (1965-10-01), Klinger-Lohr
patent: 3241805 (1966-03-01), Schumann
patent: 4421298 (1983-12-01), Kujawski
Chambers A. Michael
Gilfillan III John G.
Murray Jeremiah G.
Strahman Valves Inc.
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