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FIRE-FIGHTING EQUIPMENT
PORTABLE FIRE-FIGHTING EQUIPMENT

Airman - Aviation theories and other practices
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couplings. All threaded parts of fire hose fittings and couplings have standard threads and are easy to connect.  Hoses and fittings 1 1/2 inches and below have standard pipe threads. Those 2 1/2 inches and over have standard Navy hose threads. Two people working together can quickly prepare a fire hose. You can do the job alone if you place the hose on the deck and hold it down with your foot just behind the fitting. The pressure of your foot will cause the metal fitting on the end of the hose to point upward. In this position you can screw in the nozzle or other fitting. Fire hose is usually located on a bulkhead rack near a fireplug. Nozzles, extensions called applicators, and spanner wrenches are stowed on the bulkhead near the hose.  See figure 12-4.  When two lines are located separately on the bulkhead, one is connected to the firemain and the other is left unconnected. HIGH-CAPACITY AFFF SYSTEMS An AFFF station consists of a 600-gallon AFFF concentrate tank, a single-speed injection pump or a two-speed AFFF pump, electrical controllers, valves, and necessary piping. Saltwater and AFFF flow is controlled by hydraulically operated valves, which are actuated by solenoid-operated pilot valves (SOPVs). The SOPVs are activated by electrical switches at user locations (Pri-Fly, NAVBRIDGE, hose stations, and CON-FLAG stations). The injection pump system supplies the flush deck nozzles on the flight deck, and the deck edge nozzles on CVNs and some CVs. The two-speed pump operates at 27 or 65 gpm, depending upon the demand. The low-rate output will supply handlines and small sprinkler systems. High-demand systems, such as hangar bay sprinklers, are served by the high-speed output. On selected CVs, the two-speed pump supplies the deck edge nozzles. Hangar Deck AFFF Sprinkler System The AFFF sprinkler systems are installed in the overhead of the hangar deck. The sprinkler system is divided into groups that can be individually actuated. Each group is supplied from two risers—one from a port AFFF injection station and one from a starboard AFFF injection station. Controls to start and stop flow to individual sprinkler groups are located in the conflagration (CONFLAG) stations and along each side of the hangar deck near the related sprinkler group. Flight Deck AFFF Extinguishing System Flight decks have an AFFF fire-fighting system that consists of flush-deck, flush-deck cannon-type, and deck-edge nozzles installed in combination with the 12-5 FIRE PLUG (VALVE) SPANNER WRENCHES CLOSED POSITION OPEN POSITION (TO INDICATE LEAKAGE) WYE-GATE CONNECTED TO FIRE PLUG ALL HOSE SHALL BE A MINIMUM OF 6” OFF THE DECK ANf1204 Figure 12-4.—Typical fire hose station.







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