N Nozzles

Fire Protection Spiral Spray Nozzles

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  • Simplicity of design
  • One-piece/no internal parts
  • Clog-resistant
  • Three standard pipe sizes—½", 1" and 1½"
  • Male connection
  • Factory Mutual, U.S. Coast Guard and Lloyd's Register approved models
  • All N1-N3W nozzles provided with integral strainer
    Strainer material: 316SS
    24 mesh (0.027" opening)

  • Two spray cones—an outer, wide angle cone and a narrower inner cone—combine to give full cone effect

Fire Protection Approved

This BETE high-efficiency spiral was designed specifically with critical fire and explosion suppression applications in mind. These nozzles feature superior performance unequaled by traditional whirl nozzles.

Superior Performance Characteristics

  • Sprays composed on droplets 30% to 50% smaller than conventional designs at equivalent pressures
  • Extraordinarily large surface area of spray enhances evaporation and cooling
  • Rugged, compact design
  • Multiple concentric cone spray, unique to spiral pattern, maximizes contact

Superior Fire/Loss Prevention Applications

  • Gas wellhead protection
  • Offshore platform protection
  • Safeguarding ship-borne cargo
  • Storage tank protection
  • Secondary explosion protection in explosive, dusty environments
  • Mitigation of HF and other toxic gas releases
Common Materials:
316, Brass, Nickel Aluminum Bronze, Titanium

Full Cone

Select a nozzle number below for performance graph, drawings, and to request a quote.
Nozzle Number Connection Sizes Spray Angles gpm @ psi     (density: 1 SG)
10 psi 20 psi 50 psi 75 psi 100 psi 150 psi
N 1 1/2″ 90°, 120° 3.00 4.24 6.71 8.22 9.49 11.6
N 2 1/2″ 90°, 120° 5.31 7.51 11.9 14.5 16.8 20.6
N 3 1/2″ 90°, 120° 8.25 11.7 18.5 22.6 26.1 32.0
N 4 1/2″ 90°, 120° 12.0 17.0 26.9 33.0 38.1 46.7
N 5 1/2″ 90°, 120° 16.5 23.3 36.9 45.2 52.2 63.9
N 6 1/2″, 1″ 90°, 120° 21.0 29.7 47.0 57.5 66.4 81.3
N 7 1″ 90°, 120° 33.5 47.4 75.0 91.8 106 130
N 8 1 1/2″ 90°, 120° 47.4 67.1 106 130 150 184
N 9 1 1/2″ 90°, 120° 64.5 91.2 144 177 204 250
N 10 1 1/2″ 90°, 120° 84.4 119 189 231 267 327