Method and device for maintaining a fluid at a working pressure in a substantially closed fluid circulation system
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United States of America Patent
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-
Oct 10, 1995
Grant Date -
N/A
app pub date -
Oct 29, 1993
filing date -
Oct 29, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and device for maintaining a fluid at a working pressure in a substantially closed fluid circulation system wherein the temperature of the fluid can vary and which is preferably deaerated continuously. The maintenance of a working pressure is realized by keeping the system filled automatically by connecting said system, by means of a closable connection, to a stock of fluid which is under atmospheric pressure, the fluid circulation system and the stock of fluid being connected directly, which connection is opened at and below atmospheric pressure at the location of the connection and, when the working pressure rises, is automatically closed at atmospheric pressure at the location of the connection. If so desired, replenishment of the stock of fluid, which is preferably disposed in the vicinity of the highest point of the system and may serve as expansion possibility for the system, may be effected automatically.
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