In-line flow-control valve

Details In-line flow-control valve In-line flow-control valve

1976-09-13

1978-03-28

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

G05D 701

Patent

active

040809935

ABSTRACT:
Sensitive control of the rate of flow of a fluid under pressure over a wide range of pressures and over a wide range of pressure differentials is effected by a valve comprising a pair of telescoping piston and regulator elements movable relative to each other against the biasing action of a spring when the fluid pressure upon the valve exceeds a predetermined level, the relative motion of the two elements (the upstream piston element and the downstream regulator element) resulting in a degree of closure of ports in the downstream regulator element which depends on the degree to which the pressure differential across the valve differs in magnitude from a pre-selected pressure differential. A critical relationship of the areas of piston ports, regulator ports and fixed-area exit orifice is defined which gives novel and unexpected flow-rate control over wide pressure differentials across the valve.

REFERENCES:
patent: 1221660 (1917-04-01), Bice
patent: 2800141 (1957-07-01), Hedland
patent: 2845087 (1958-07-01), Thomas
patent: 3015341 (1962-01-01), Hedland et al.
patent: 3130747 (1964-04-01), Benaway
patent: 3431944 (1969-03-01), Sakuma

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