BETE N Spiral Fire Protection Nozzles

FM and UL Approved Full Cone Nozzles for Offshore Fire Protection

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

  • Simplicity of design
  • Designed specifically with critical fire and explosion suppression applications in mind
  • One-piece/no internal parts
  • Clog-resistant
  • All N1-N3W nozzles provided with integral strainer
  • N1-N3W strainer: 316 SS, 24 mesh (0.027" opening)
  • Three standard pipe sizes—½”, 1″ and 1½”
  • Male connection
  • Factory Mutual, U.S. Coast Guard and Lloyd’s Register approved models

Spray Characteristics of the Bete N Fire Protection Nozzle:

  • Two spray cones—an outer, wide angle cone and a narrower inner cone—combine to give full cone effect
  • Spray pattern: Full Cone
Available Spray Angles Flow Rate Range
90 - 120° 3 to 597 gpm
Available Connection Types Materials
  • Pipe: 1/2, 1, 1 1/2
  • Connection Methods: Thread (NPT, BSP, Male)
Brass, 316, Nickel Aluminum Bronze, Titanium


Bete N 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

Bete N Superior Fire/Loss Prevention Applications:

  • Gas wellhead protection
  • Safeguarding ship-borne cargo
  • Storage tank protection
  • Secondary explosion protection in explosive, dusty environments
  • Mitigation of HF and other toxic gas releases

Also available in nickel aluminum bronze and titanium, plus other materials on request.

Spray Angle Visual: 90° and 120°

spray_full90spiral  spray_full120STXPspiral

How Spray Pattern is Achieved

  • The spray pattern of the spiral nozzle is formed by the fluid shearing along with the turns of the spiral, which produce multiple concentric cones. These cones form 2 to 3 bands of relatively coarse droplets, surrounded by wider bands of relatively fine droplets.
  • The large surface area of spray improves evaporation and cooling.



BETE N - Datasheet

BETE N - Datasheet

BETE N Fire Protection Datasheet - Metric

BETE N Fire Protection Datasheet - Metric


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