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How does the preaction sprinkler system work?

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Question added by magdy abd al nour , HVAC Site manger , First United Co.
Date Posted: 2015/06/10
magdy abd al nour
by magdy abd al nour , HVAC Site manger , First United Co.

it must take a signal to start from the detector even after the sprinkler glass  is broken by fire

Hasan Riaz
by Hasan Riaz , Mechanical Engineer , Saudi Bin Ladin Group (Hamad International Airport)

Pre-action sprinkler system works with double interlocking. After the check valve, there is air in the system to ensure that the area is water free in case of leaks. For sprinkler to operate, there must be both the detection of smoke by smoke detector and the open sprinkler head by the rise of heat in that area.

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