Control arrangement for actuating a shut-off valve and method of

Details Control arrangement for actuating a shut-off valve and method of Control arrangement for actuating a shut-off valve and method of

1994-10-20

1997-08-19

Hepperle, Stephen M.

Fluid handling

Processes

Carbonated beverage handling processes

137396, 1374895, 137907, 251 75, F16K 1700

Patent

active

056577842

ABSTRACT:
A control arrangement (10) for a shut-off valve actuable by vacuum and intended for use in vacuum waste water systems, comprising a first valve (14) which is actuated by static pressure of collected waste water, and including a chamber (56) which can be put under vacuum via the first valve, whereby a second valve (20), charged by a spring (71), is abruptly opened when the pressure in the chamber drops below a preset level, so that vacuum reaches the shut-off valve and opens it, and, in case static pressure is reduced, the first valve closes and the chamber is gradually ventilated until the pressure in this chamber reaches a preset level at which the second valve and in turn the shut-off valve abruptly close.

REFERENCES:
patent: 2620825 (1952-12-01), Cannon
patent: 3174500 (1965-03-01), Johnson et al.
patent: 3998736 (1976-12-01), Greenleaf
patent: 5048558 (1991-09-01), Calhoun
patent: 5269337 (1993-12-01), Goldsmith
Alan F. Hassett, John C. Starnes, Journal WPCF, vol. 53. No. 1 pp. 59-65, "Vacuum Wastewater Collection . . . ".
Gray, "Vacuum Sewers: Fundamentals and Design Methods" 1988 Critical Water Issues and Computer Applications: Proceedings of the 15th Annual Water Resources Conference (Abstract only).
Gray, "Toward a New Model for Head Loss in Vacuum Sewers" 1985 1985 International Symposium on Urban Hydrology, Hydraulic Infrastructures and Water Quality Control (Abstract only).
Foreman, "Wastewater Collection by Vacuum" 1985 1985 International Symposium on Urban Hydrology, Hydraulic Infrastructures and Water Quality Control (Abstract only).

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