Abstract: A fire protection sprinkler system and related method for a storage area for one or more commodities or high energy commodities, the storage area having one or more racks that each includes one or more bays. The fire protection sprinkler system includes a piping network supplied by a source of fire protection fluid. The fire protection system includes a plurality of horizontal sidewall sprinklers. Each of the plurality of horizontal sidewall sprinklers has a K-factor of 11.2 gpm/(psi)1/2 or greater and is positioned horizontally at a perimeter of the racks to direct the fire protection fluid into the bays. Each of the plurality of horizontal sidewall sprinklers includes a deflector that distributes the fire protection fluid to a coverage area. The fire protection sprinkler system can also include vertical sidewall sprinklers positioned vertically and include a deflector that directs the fire protection fluid horizontally into the bays.

Abstract: A ceiling-only fire protection sprinkler system for a storage area having a storage height up to forty-three feet (thirteen and one tenth meters) and a ceiling height exceeding forty-five feet (thirteen and seven tenths meters). The storage area includes floor storage or rack storage that has aisle widths less than six feet (one and eight tenths meters) and transverse flue spaces less than six inches (one hundred fifty millimeters). The system includes fire suppression sprinklers that each includes a deflector positioned at a height that is at least three feet (nine tenths meters) greater than the storage height and at least one foot (three tenths meters) below the ceiling. Activated sprinklers have a coverage area greater than sixty-four square feet (five and nine tenths square meters) and up to one hundred square feet (nine and three tenths square meters) per each activated sprinkler.

Abstract: A pressure maintenance device is connected to a fire protection sprinkler system having downstream piping that is exposed to freezing temperatures, and supplies a pressurized fluid to the downstream piping when the sprinkler system is in an inactivated state. When an outlet pressure sensor near an outlet of the pressure maintenance device detects that a pressure of the pressurized fluid downstream of an outlet regulator falls below a first predetermined pressure, the pressure maintenance device supplies the pressurized fluid in a primary supply mode or a secondary supply mode. The pressure maintenance device automatically switches from the primary supply mode to the secondary supply mode if a supply pressure sensor detects that a pressure of the pressurized fluid downstream of a first pressurized fluid valve, and upstream of the outlet pressure regulator, falls below a second predetermined pressure.

Abstract: A pressure maintenance device is connected to a fire protection sprinkler system having downstream piping that is exposed to freezing temperatures, and supplies a pressurized fluid to the downstream piping when the sprinkler system is in an inactivated state. When an outlet pressure sensor near an outlet of the pressure maintenance device detects that a pressure of the pressurized fluid downstream of an outlet regulator falls below a first predetermined pressure, the pressure maintenance device supplies the pressurized fluid in a primary supply mode or a secondary supply mode. The pressure maintenance device automatically switches from the primary supply mode to the secondary supply mode if a supply pressure sensor detects that a pressure of the pressurized fluid downstream of a first pressurized fluid valve, and upstream of the outlet pressure regulator, falls below a second predetermined pressure.