Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1979-07-13
1981-02-17
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137503, G05D 701
Patent
active
042509157
ABSTRACT:
An automatic fluid control valve for maintaining a substantially constant fluid flow rate includes a partition wall within a valve casing between a fluid inlet and a fluid outlet. A restriction adjusting member is mounted movably in the valve casing and includes a tapered end movable relative to a valve port in the partition wall to define a restricted passageway for fluids with the adjacent walls of the valve port. A valve stem is movable within the casing and has a valve thereon cooperable with the valve port to regulate the flow of fluids therethrough in response to changes in fluid pressure differential. A diaphragm is operatively connected to the valve stem and separates a region within the valve casing into a pair of pressure-differential chambers, and a flow passage is formed in the casing communicating one pressure-differential chamber with the inlet chamber, the other pressure-differential chamber communicating with the downstream side of the valve port.
REFERENCES:
patent: 2608209 (1952-08-01), Bryant
patent: 2803264 (1957-08-01), Griswold
patent: 3028876 (1962-04-01), Gratzmuller
patent: 3428080 (1969-02-01), Brown
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