Fluid handling – Processes – Involving pressure control
Patent
1992-04-20
1993-01-26
Cohan, Alan
Fluid handling
Processes
Involving pressure control
138 42, 138 44, G05D 701
Patent
active
051815320
ABSTRACT:
Using conventional manufacturing methods, porous, sintered, compacted powder bodies shaped as straight cylinders can be produced with extremely small variations in their flow resistance to a fluid. According to the invention, such bodies are produced in series so that, for a certain fluid and a certain pressure drop above the body, they produce a predetermined flow which can easily be regulated by using simple pressure-regulating equipment for controlling the pressure drop. The invention comprises an apparatus consisting of a pipe with pressure-regulating means, a container for a body according to the invention, and a series of bodies with different flow resistance for setting different flow intervals in the pipe for given fluids. The invention also comprises a method for setting a predetermined flow for a specific fluid at a given pressure, and the use of well defined porous bodies enabling a desired pressure to be set by regulating the pressure drop across the body.
REFERENCES:
patent: 3490561 (1970-01-01), Colgan
patent: 3792609 (1974-02-01), Blair
patent: 4062424 (1977-12-01), Lyden
patent: 4393651 (1983-07-01), Peck
patent: 4422339 (1983-12-01), Gall
patent: 4858643 (1989-08-01), Vavra
Brodefors Lage
Irstam Lars
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