Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1993-03-05
1994-06-28
Michalsky, Gerald A.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137461, 137492, F16K 1700
Patent
active
053237994
ABSTRACT:
A mechanical pressure relief system for a pressurized operating system which is suitable for high purity applications. The pressure relief system utilizes a mechanical logic switch, operable at a set point pressure, in conjunction with a pressurized actuating fluid, completely separated from the processing fluid. The system further utilizes shuttle valves to provide an additional degree of safety, with the minimization of emission of potentially highly hazardous gases, when used in the pressure relief system to prevent further inflow and outflow of processing fluid. Diversion elements are activated, with the pressure logic switch at preselected pressures, for ingress into the system of an actuating fluid. The actuating fluid serves to open venting passageways and to close processing fluid passageways until excessive pressure is relieved. When normal pressure is attained, the pressure logic switch reverses with closing of venting passageways and opening of processing fluid passageways. A belleville spring with a specific eversion pressure characteristic, operates in a fluid tight manner to direct flow of the actuating fluid to operable sites and which reverts to initial position upon pressure relief. Optional safety elements, operated by the actuating fluid, include a manual reset or controlled restart.
REFERENCES:
patent: Re31845 (1985-03-01), Peters
patent: 474711 (1892-05-01), Allan
patent: 892788 (1908-07-01), Wilkins
patent: 1664493 (1928-04-01), Smith
patent: 2655935 (1953-10-01), Kinzbach
patent: 4630645 (1986-12-01), Spa
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