Double Interlock Preaction System

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Itm information about double interlock preaction fire sprinkler systems. House # 365/9 (2nd floor), lane: [909:9. 12. 24. 4. 1. 4 (d)]. Standard for the installation of sprinkler systems 2019 of illinois > 26.

The riser check valve (that does not. Double interlock preaction system were designed to be used in freezer storage warehouse conditions where the consequences of getting water into the piping are severe. Double interlock preaction system 18 1. Electric/pneumatic release 18 2. Pneumatic/pneumatic release 18 3. The operation of double interlock systems is similar to deluge systems except that automatic sprinklers are used. These systems require that both a “preceding” fire detection. Preaction systems utilize closed sprinklers, compressed nitrogen or air in the system piping, and water under pressure held below the clapper of the valve. Preaction systems require a.