Sensitive fluid balancing relief valve

Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface

Reexamination Certificate

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Details

C137S512150

Reexamination Certificate

active

06886591

ABSTRACT:
A relief valve comprising a diaphragm for control of process pressure is provided. The diaphragm has a fluid pressure on a first side and a process pressure on a second side. The second side is engagable with a process void and at least one vent void such that when the process pressure is below the fluid pressure the diaphragm is engaged with the vent void. When the process pressure is above the fluid pressure the diaphragm is not engaged with the vent void.

REFERENCES:
patent: 4679421 (1987-07-01), Barree
patent: 4712580 (1987-12-01), Gilman et al.
patent: 4981157 (1991-01-01), Denkinger
patent: 5265645 (1993-11-01), Goodwin
patent: 5944050 (1999-08-01), Walker
patent: 6095183 (2000-08-01), Taylor et al.
patent: 6318406 (2001-11-01), Conley

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