Patent ID: 8307906

Claim:
A fire suppression sprinkler system for conducting a fire suppressant from a pressurized source of said suppressant to a fire, said system being powered by an electrical power supply and an electrical battery and comprising: a piping network in fluid communication with said pressurized source of fire suppressant; at least one sprinkler in fluid communication with said piping network, said sprinkler being normally closed and having means for opening in response to a fire; a control valve positioned in said piping network between said pressurized source and said sprinkler for controlling flow of said fire suppressant from said pressurized source to said sprinkler, said control valve being normally maintained in a closed configuration, said control valve being openable to permit said fire suppressant to flow to said sprinkler; a source of compressed gas in fluid communication with said piping network between said control valve and said sprinkler for pressurizing said piping network with said gas; an electrical actuator associated with said control valve for opening said control valve in response to an electrical signal, said electrical actuator being powered at least by said power supply; a pneumatic actuator in fluid communication with said piping network, said pneumatic actuator being associated with said control valve for opening said control valve in response to a pressure change within said piping network; an isolation valve in fluid communication with and positioned between said pneumatic actuator and said piping network, said isolation valve controlling gas flow from said piping network to said pneumatic actuator, said isolation valve being powered by said power supply or said battery and settable in either an open configuration allowing fluid flow between said piping network and said pneumatic actuator, or a closed configuration preventing fluid flow between said piping network and said pneumatic actuator, said isolation valve drawing no electrical power when set in either of said open or closed configurations; at least one fire sensor co-located with said sprinkler, said fire sensor being powered at least by said power supply; a control system in communication with said electrical actuator, said isolation valve, and said fire sensor, said control system being powered by said power supply and said battery, said control system having a circuit to detect loss of power from said power supply and being programmed to set said isolation valve in said open configuration in response thereto.