Combined check valve and pressure relief valve

Details Combined check valve and pressure relief valve Combined check valve and pressure relief valve

2008-04-04

2009-08-04

Rivell, John (Department: 3753)

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

C137S493600

Reexamination Certificate

active

07568497

ABSTRACT:
A valve for use in regulating the flow of fluid between a first and a second fluid side is provided. The valve comprises a valve body and an aperture extending through the valve body. The aperture comprises an inner wall, a first aperture diameter at the first end of the aperture and a second aperture diameter at the second end of the aperture. The valve further comprises a first valve insert positioned in the aperture with a first insert diameter and a first mating feature. The first insert diameter is larger than the first aperture diameter. The valve further comprises a second valve insert having a first width, a second width and a second mating feature. The first width is larger than the second aperture diameter. The first mating feature cooperates with the second mating feature to engage the first valve insert to the second valve insert.

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Circle Seal Controls, Inc., “100 Series Check Valves 0 to 25 PSIG,” brochure, Circle Seals Controls, Inc. (Corona, California), p. 1-2.
Circle Seal Controls, Inc., “200 Series 0 to 3,000 PSIG H200 Series 0 to 6,000 PSIG Check Valves,” brochure.

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