Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1977-06-13
1979-03-06
Weakley, Harold W.
Fluid handling
Line condition change responsive valves
Direct response valves
137542, F16K 1500
Patent
active
041425502
ABSTRACT:
A pressure regulating valve is disclosed as including a valve seat having a flat working surface and a central inlet bore extending perpendicularly from the flat working surface through the seat. A valve disc having a flat circular working surface, the diameter of which is at least three times as large as the diameter of the inlet bore, is positioned against the seat in a coaxial relationship with the inlet bore to provide a large annular area of contact with the flat seat surface. The disc is biased toward the seat by an assembly including a spring within a spring housing, a piston, reciprocally engaged in the innermost end of the spring housing, and a ball bearing received in opposed recesses in the seat and disc. When subjected to high pressure bypass flow through the valve seat inlet bore, the disc is forced from the seat and attains a stable, parallel orientation relative to the seat under the influence of the bypass flow. Within the wide annular flow passageway between the disc and seat, the bypass fluid undergoes a controlled and substantial reduction in velocity before discharging from the annular exit of such passageway, thereby minimizing errosive wear of the valve part which surrounds the annular exit.
REFERENCES:
patent: 2021771 (1935-11-01), Farmer
patent: 2568026 (1951-09-01), Pigott
patent: 2874718 (1959-02-01), Kelly
patent: 3006364 (1961-10-01), Osborn
patent: 3168108 (1965-02-01), Patrick
McDonald Dean T.
Williams Michael R.
FMC Corporation
Kelly R. S.
McNaughton T. J.
Weakley Harold W.
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