System valve activation methods for deluge-like wet pipe sprinkler system
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United States of America Patent
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Dec 28, 2010
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N/A
app pub date -
Dec 5, 2006
filing date -
Dec 5, 2006
priority date (Note) -
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Abstract
A method for activating a sprinkler system comprises maintaining a liquid extinguishant in system pipes under a standby pressure that is less than the operating pressure, determining an arrangement of the sprinklers that will control a fire, and opening the sprinkler system valve in response to a drop in pressure in each of the pipes to which at least one of the sprinklers of the arrangement is connected. An alternate method comprises providing a bypass around the system valve, and opening the system valve in response to (1) a predetermined flow of liquid extinguishant through the bypass and (2) a drop in pressure in the sprinkler system below a predetermined pressure. In a variation of the alternate method, the system valve is opened in response only to a predetermined flow of liquid extinguishant through the bypass.
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