Nozzles & Couplings
Fire nozzles and couplings are the end-point and jointing components in the fire system. Nozzles control spray pattern and range; couplings join hoses together or to valves. Materials range from brass to aluminum to industrial plastics, with standard diameters following BS, NH, or Storz (Europe). Core components to hose performance.
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About this category
Nozzles and couplings are the critical links that determine whole-system efficiency. Nozzles: jet nozzles produce a concentrated water stream with long range (15-25 m) for distant fires; spray nozzles produce a fine cone that cools radiant heat; combination nozzles switch between jet and spray by rotating a collar; fog nozzles produce a fine mist that is very efficient at heat absorption; automatic nozzles maintain constant pressure regardless of flow. Materials: brass (most durable, corrosion-resistant), aluminum (lighter, lower cost), industrial plastic (ABS or nylon for lighter use). Couplings: Storz couplings (Europe) with quarter-turn quick-connect, Nakajima couplings (Asia) with quick-connect fittings, BS couplings (UK) with external latches, and NH couplings (North America) with national threads. Materials: brass or aluminum with a rubber gasket for a tight seal. Sizes: match hose diameter (1.5" and 2.5" for flat hose; 19 mm or 25 mm for reels). Applications: all portable fire systems. A technical note: compatibility among nozzle, hose, and valve defines the final performance; a mismatch causes pressure loss or leakage. Specifications follow NFPA 1964, EN 15182, and EN 14420 (couplings).
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Nozzles and couplings are the critical links that determine whole-system efficiency. Nozzles: jet nozzles produce a concentrated water stream with long range (15-25 m) for distant fires; spray nozzles produce a fine cone that cools radiant heat; combination nozzles switch between jet and spray by rotating a collar; fog nozzles produce a fine mist that is very efficient at heat absorption; automatic nozzles maintain constant pressure regardless of flow. Materials: brass (most durable, corrosion-resistant), aluminum (lighter, lower cost), industrial plastic (ABS or nylon for lighter use). Couplings: Storz couplings (Europe) with quarter-turn quick-connect, Nakajima couplings (Asia) with quick-connect fittings, BS couplings (UK) with external latches, and NH couplings (North America) with national threads. Materials: brass or aluminum with a rubber gasket for a tight seal. Sizes: match hose diameter (1.5" and 2.5" for flat hose; 19 mm or 25 mm for reels). Applications: all portable fire systems. A technical note: compatibility among nozzle, hose, and valve defines the final performance; a mismatch causes pressure loss or leakage. Specifications follow NFPA 1964, EN 15182, and EN 14420 (couplings).
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