A dry sprinkler is provided that includes a structure, a fluid deflecting structure, a locator, a metallic annulus and a shield. The structure defines a passageway extending along a longitudinal axis between an inlet and an outlet. The structure has a rated K-factor defining an expected flow of fluid in gallons per minute from the outlet divided by the square root of the pressure of the flow of fluid fed into the inlet of the passageway in pounds per square inch gauge. The fluid deflecting structure is proximate the outlet. The locator is movable along the longitudinal axis between a first position and a second position. The locator supports the metallic annulus. The metallic annulus includes first and second metallic surfaces spaced apart along the longitudinal axis between an inner and outer circumference with respect to the longitudinal axis. The shield has a first face exposed to the inlet and a second face confronting the first metallic surface to define a gap there between. Various methods are also described.

A dry sprinkler is provided that includes a structure, a fluid deflecting structure, a locator, a metallic annulus and a shield. The structure defines a passageway extending along a longitudinal axis between an inlet and an outlet. The structure has a rated K-factor defining an expected flow of fluid in gallons per minute from the outlet divided by the square root of the pressure of the flow of fluid fed into the inlet of the passageway in pounds per square inch gauge. The fluid deflecting structure is proximate the outlet. The locator is movable along the longitudinal axis between a first position and a second position. The locator supports the metallic annulus. The metallic annulus includes first and second metallic surfaces spaced apart along the longitudinal axis between an inner and outer circumference with respect to the longitudinal axis. The shield has a first face exposed to the inlet and a second face confronting the first metallic surface to define a gap there between. Various methods are also described.

In various embodiments, a fire suppression system includes a high rate discharge system and a low rate discharge system. The low rate discharge system may comprise components that are capable of varying mass flow of a fire suppression agent in term of the ambient conditions of the aircraft structure. In this regard, the low rate discharge system may comprise a valve that is configured to sense at least one of the ambient pressure and ambient temperature of an aircraft structure.

In various embodiments, a fire suppression system includes a high rate discharge system and a low rate discharge system. The low rate discharge system may comprise components that are capable of varying mass flow of a fire suppression agent in term of the ambient conditions of the aircraft structure. In this regard, the low rate discharge system may comprise a valve that is configured to sense at least one of the ambient pressure and ambient temperature of an aircraft structure.

The present disclosure relates to a valve system that includes a valve having a spool moveable from an un-actuated position to an actuated position in response to actuation of the valve. The valve system also includes a wire to secure the valve in the un-actuated position, a first resistor electrically coupled with the wire and configured to release the wire to actuate the valve and move a first component coupled to the wire toward a second component, and a second resistor electrically coupled with the wire to detect connection of the first component with the second component.

The present disclosure relates to a valve system that includes a valve having a spool moveable from an un-actuated position to an actuated position in response to actuation of the valve. The valve system also includes a wire to secure the valve in the un-actuated position, a first resistor electrically coupled with the wire and configured to release the wire to actuate the valve and move a first component coupled to the wire toward a second component, and a second resistor electrically coupled with the wire to detect connection of the first component with the second component.

An aisle containment roof system includes a frame configured to be supported by two rows of racks or by the one row of racks and a wall or by a dedicated frame structure independent of the two rows of racks. The aisle containment roof system further includes a fixed perforated panel fixedly secured to the frame. The fixed perforated panel includes a pattern of openings formed therein. The aisle containment roof system further includes a movable perforated panel movably secured to the frame. The movable perforated panel has a pattern of openings corresponding to the pattern of openings of the fixed perforated panel. The aisle containment roof system further includes a mechanism configured to move the movable perforated panel relative to the fixed perforated panel to align the openings of the movable perforated panel to the openings of the fixed perforated panel.

An aisle containment roof system includes a frame configured to be supported by two rows of racks or by the one row of racks and a wall or by a dedicated frame structure independent of the two rows of racks. The aisle containment roof system further includes a fixed perforated panel fixedly secured to the frame. The fixed perforated panel includes a pattern of openings formed therein. The aisle containment roof system further includes a movable perforated panel movably secured to the frame. The movable perforated panel has a pattern of openings corresponding to the pattern of openings of the fixed perforated panel. The aisle containment roof system further includes a mechanism configured to move the movable perforated panel relative to the fixed perforated panel to align the openings of the movable perforated panel to the openings of the fixed perforated panel.

Fire protection systems and methods for ceiling-only high-piled storage protection. The systems include a plurality of fluid distribution devices disposed beneath a ceiling and above a high-piled storage commodity having a nominal storage height ranging from a nominal 20 ft. to a maximum nominal storage height of 55 ft. and means for quenching a fire in the storage commodity. The stored commodity to be protected may include exposed expanded plastics. The fluid distribution devices include a frame body having an inlet, an outlet, a sealing assembly, and an electronically operated releasing mechanism supporting the sealing assembly in the outlet.

Fire protection systems and methods for ceiling-only high-piled storage protection. The systems include a plurality of fluid distribution devices disposed beneath a ceiling and above a high-piled storage commodity having a nominal storage height ranging from a nominal 20 ft. to a maximum nominal storage height of 55 ft. and means for quenching a fire in the storage commodity. The stored commodity to be protected may include exposed expanded plastics. The fluid distribution devices include a frame body having an inlet, an outlet, a sealing assembly, and an electronically operated releasing mechanism supporting the sealing assembly in the outlet.