A fire protection nozzle includes a body having two frame arms having proximal ends connected to an outlet of the body, and distal ends, the two frame arms defining a frame arm plane, and a junction formed by the distal ends of the frame arms, the junction including a central bore and an outer wall. A deflector is mounted to the body, and includes a planar member having a mounting hole in a center of the planar member to receive the outer wall of the junction, and a plurality of slots on a periphery of the planar member. The plurality of slots includes first slots, second slots, third slots, and fourth slots.

System and methods to provide ceiling-only suppression fire protection of up to fifty feet (50 ft.) of rack storage of cartoned unexpanded plastic commodities and less hazardous commodities, such as for example, Class 1, Class 2, Class 3, Class 4 and/or combinations thereof beneath a ceiling having a maximum ceiling height up to fifty-five feet (55 ft.). The systems and methods provide for hydraulic and system parameters that include a hydraulic design area based upon five to no more than twelve hydraulically most remote sprinklers spaced at a preferred sprinkler-to-sprinkler spacing of eight to ten feet (8-10 ft.) coupled to two to four branch lines tied to a common cross main supply pipe of firefighting fluid.

System and methods to provide ceiling-only suppression fire protection of up to fifty feet (50 ft.) of rack storage of cartoned unexpanded plastic commodities and less hazardous commodities, such as for example, Class 1, Class 2, Class 3, Class 4 and/or combinations thereof beneath a ceiling having a maximum ceiling height up to fifty-five feet (55 ft.). The systems and methods provide for hydraulic and system parameters that include a hydraulic design area based upon five to no more than twelve hydraulically most remote sprinklers spaced at a preferred sprinkler-to-sprinkler spacing of eight to ten feet (8-10 ft.) coupled to two to four branch lines tied to a common cross main supply pipe of firefighting fluid.

A sprinkler head alloy fuse of the present invention enables, when a fire occurs, firefighting water that is in an always-pressed state to be strongly discharged and be reflected to a water reflection plate such that the fire can be rapidly and automatically suppressed, wherein the alloy fuse eccentrically couples a first lever and a second lever, is inserted into a heating tube, and is welded by a fusible low-temperature alloy. When a fire occurs and the ambient temperature reaches a sprinkler operation temperature, heat temperature transferred to the heating tube rapidly fuses the fusible low-temperature alloy, the heating tube is separated from a welded part by means of the elasticity of a spring mounted in a second lever groove, the central balance of the eccentrically coupled levers is broken, a nozzle plug is opened, and thus, a sprinkler head is operated. The alloy fuse of the present invention reduces high operation temperature deviation as in a glass fuse, precisely operates, maintains strong impact resistance, enables automatic production of a sprinkler head, and reduces manufacturing cost.

A sprinkler head alloy fuse of the present invention enables, when a fire occurs, firefighting water that is in an always-pressed state to be strongly discharged and be reflected to a water reflection plate such that the fire can be rapidly and automatically suppressed, wherein the alloy fuse eccentrically couples a first lever and a second lever, is inserted into a heating tube, and is welded by a fusible low-temperature alloy. When a fire occurs and the ambient temperature reaches a sprinkler operation temperature, heat temperature transferred to the heating tube rapidly fuses the fusible low-temperature alloy, the heating tube is separated from a welded part by means of the elasticity of a spring mounted in a second lever groove, the central balance of the eccentrically coupled levers is broken, a nozzle plug is opened, and thus, a sprinkler head is operated. The alloy fuse of the present invention reduces high operation temperature deviation as in a glass fuse, precisely operates, maintains strong impact resistance, enables automatic production of a sprinkler head, and reduces manufacturing cost.

A method and device for protecting and installing a fire protection sprinkler assembly having a thermally responsive trigger. The method includes shielding and torquing a fire protection sprinkler with a protective device having a torque assist feature. The protective device includes a first member and a second member opposed and spaced about a plane to define an internal void and a lateral slot for strapping about the sprinkler. The torque assist feature includes a first confronting segment of the first member and a second confronting segment of the second member. The first and second confronting segments are disposed on opposite sides of the plane and spaced apart laterally about the device axis. Each of the first and second confronting segments define an internal surface of the device that form a contact surface engagement with one arm in the pair of frame arms to transfer a torque or rotational force to the sprinkler.

A method and device for protecting and installing a fire protection sprinkler assembly having a thermally responsive trigger. The method includes shielding and torquing a fire protection sprinkler with a protective device having a torque assist feature. The protective device includes a first member and a second member opposed and spaced about a plane to define an internal void and a lateral slot for strapping about the sprinkler. The torque assist feature includes a first confronting segment of the first member and a second confronting segment of the second member. The first and second confronting segments are disposed on opposite sides of the plane and spaced apart laterally about the device axis. Each of the first and second confronting segments define an internal surface of the device that form a contact surface engagement with one arm in the pair of frame arms to transfer a torque or rotational force to the sprinkler.

An automatic fire protection sprinkler assembly for fire protection systems that includes a tubular outer housing having an inlet, an outlet opening and an internal shelf proximate the outlet opening. A fluid deflection member is spaced from the outlet opening along a fluid flow path of the assembly. A fluid control assembly is disposed within the outer housing for axial translation from an unactuated state to an actuated state of the sprinkler assembly. The fluid control assembly includes a seal subassembly, a fluid flow tube; and an ejectable support subassembly. The support subassembly includes a projection member. Upon actuation of a thermally responsive trigger, the oa support subassembly is ejected out the outlet opening such that the projection member comes into contact with the internal shelf of the housing to pivot the support subassembly out of the fluid flow path.

An automatic fire protection sprinkler assembly for fire protection systems that includes a tubular outer housing having an inlet, an outlet opening and an internal shelf proximate the outlet opening. A fluid deflection member is spaced from the outlet opening along a fluid flow path of the assembly. A fluid control assembly is disposed within the outer housing for axial translation from an unactuated state to an actuated state of the sprinkler assembly. The fluid control assembly includes a seal subassembly, a fluid flow tube; and an ejectable support subassembly. The support subassembly includes a projection member. Upon actuation of a thermally responsive trigger, the oa support subassembly is ejected out the outlet opening such that the projection member comes into contact with the internal shelf of the housing to pivot the support subassembly out of the fluid flow path.

A sprinkler guard includes at least one plate centered relative to a central axis of the sprinkler guard. A plurality of legs includes first and second legs that are attached to one plate, and third and fourth legs that are attached to another plate. A circular ring is attached to lower ends of the first to fourth legs, a center of the circular ring coinciding with the central axis, and the first to fourth legs being spaced apart about the circumference of the circular ring. First and second arms are attached to the first and second legs, respectively. In addition, a cross bar can be attached to the circular ring and extend across a diameter of the circular ring.