Internal valve

Details Internal valve Internal valve

1980-03-24

1982-01-26

Walton, George L.

Fluid handling

Liquid level responsive or maintaining systems

With control fluid connection at desired liquid level

73290R, 137842, 141113, 141128, 141198, 251 28, 251 78, 251243, F15C 114

Patent

active

043123732

ABSTRACT:
An internal valve for the bottom loading of fuel tanks consists of a differential area piston acting within a chamber which is vented by a pair of pilot valves responsive to fluid level, to provide full open, throttled and closed positions of the valve automatically in response to inlet fluid pressure. Soft closure of the inlet valve which is formed of the piston head and a seat in the valve housing, is provided by metered fluid flow through an orifice between a sized aperture in the piston head and a restrictor sleeve carried on a tank vent actuator bar extending through the aperture and through the valve housing. A lost motion connection between the piston head and actuator bar allows limited relative movement for controlling the metering orifice and combined movement for coincident opening of the tank vent in response either to inlet fluid pressure or manual actuation.

REFERENCES:
patent: 2045758 (1936-06-01), Crossen, Jr.
patent: 2694546 (1954-11-01), Goode
patent: 2762389 (1956-09-01), Fraser
patent: 2775258 (1956-12-01), Fraser
patent: 3047009 (1962-07-01), Hunter
patent: 3095894 (1963-07-01), Jensen
patent: 3174503 (1965-03-01), Absolon
patent: 3561465 (1971-02-01), de Graaf
patent: 4161188 (1979-07-01), Jorgensen

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