Pressure equalization valve

Fluid handling – Systems – Multi-way valve unit

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Details

137874, 251368, F16K 11074

Patent

active

059506776

ABSTRACT:
A pressure equalization valve for alternatingly equalizing pressures between a first fluid source and at least two second fluid sources is disclosed. The pressure equalization valve includes a valve body, which includes a first port in fluid communication with the first fluid source and at least two second ports in fluid communication with the at least two second fluid sources, respectively, and a valve gate movable between a first equalizing position, wherein the valve gate allows fluid flow through one of the second ports and restrains fluid flow through another of the second ports to equalize substantially the fluid pressure between the first fluid source and one of the second fluid sources, and a second equalizing position, wherein the valve gate restrains fluid flow through the one of the second ports and allows fluid flow through the other of the second ports to equalize substantially the fluid pressure between the first fluid source and another of the second fluid sources. The valve further includes a chamber in the valve body between the first port and the second ports, wherein, as measured in planes that is sized to substantially reduce the velocity of fluid flowing between the first and second ports.

REFERENCES:
patent: 4273152 (1981-06-01), Freeman
patent: 4635674 (1987-01-01), Bajka
patent: 4653990 (1987-03-01), Schlect
Engineering Data--Air Lock Control, Allen-Sherman-Hoff, 1973.
Air Lock Valve for Material Handling Systems Brochure, Allen-Sherman, Hoff, 1980.
Engineering Data--Air Lock Valve for Materials Handling Systems, Allen-Sherman, Hoff, 1976.
Engineering Data--Airlocks for Pneumatic Materials Handling Systems, Allen-Sherman-Hoff, 1989.
Pneumatic Actuator--Rack and Pinion Brochure, Bray Valve and Controls U.S.A., May 1992.

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