VENT TIPS & FIRE SUPPRESSION SYSTEMS

Quick Dispersion - Static Reduction - Noise Reduction - Steam Mixing/Dispersion - Low Radiation - Flame Snuffing

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NAO vent tips provide rapid, safe dispersion of gases and vapors from a wide range of applications; from low pressure tank and process emergency and backup relieves to very high pressure sonic velocity offshore/pipeline applications.

NAO can provide complete technical assistance with the vent system including flow vs pressure drop, dispersion, ignition/thermal radiation calculation profiles, purge gas sweep and control systems.

NAO also can provide detonation/flame arresters for the vent system if there is any possibility of the feed stream containing air or oxygen.

If ignition or burning of the vent stream is undesired (for example due to space and safety limitations on an existing offshore platform), then NAO fire suppression systems can be added to the vent tips with manual and fully automatic fire suppression systems providing ultra-safe venting of waste gases to atmosphere.

NAO Vent tips have been supplied in sizes from 1/2" to 48" diameters to match standard pipe sizes.  Several metric sizes have also been produced.  Larger sizes can also be produced on application.   The materials of construction range from carbon steel flanges with stainless steel upper outlet tips to completely stainless steel, Inconel, Incoloy, Hastalloy and Monel.

Vent Tips

• Patented high performance, multi-baffle NFS-VT™ (NAO Fluidic Seal™ - Vent Type) and NFVT™ (NAO Fluidic Vent Tip™) for high and low pressure applications.  Also available in "E" type for simple applications where cost is the key selection factor.  The NAO "E" type seal is cost effective while maintaining the performance and experience of NAO's vent systems.
  
  

• Patented high performance, multi-baffle NFS-VT™ (NAO Fluidic Seal™ - Vent Type)
  can include:

•  anti-static rings to reduce possibility of ignition
•  steam or air dispersion ring
•  noise shroud
• heat tracing & insulation to prevent freezing in cold climates
• fire snuffing with steam, carbon dioxide or dry chemical

Units are engineered, designed, built and tested as per the customers requirements.

• Patented high performance, multi-vent  NJMV™ (NAO Jet Mix Vortex™) for large volumes of gas with exit velocities to sonic and very rapid dispersion.
  
  
• Patented high performance, multi-tip NMJM™ (NAO Multi Jet Mix™) for high exit velocities approaching sonic with quick vertical dispersion of the gas stream.
  
  
• Patented high performance, multi-external Coanda NMEC™ (NAO Multi External Coanda™) for very quick dispersion of high pressure gas steams.
  
  
• Smooth surfaces entrain lots of air to assure maximum dilution of exhaust gases.
  
• Reduced possibility of dangerous air intrusion into vent tip with NAO patented FLARE SEALS.
  
• NAO also has special vent tips for REDUCED NOISE in plants locations that are near neighbors.
  

Fire Snuffing and  Suppression Systems -- Manual, Automatic (Electric & Non-Electric)

• Reliable flame sensors -- local, local (non-electrical) and remote IR & UV types available.
  
• Closed-loop controls for immediate fire snuffing by main charge of carbon dioxide, 
    dry chemical, Halon substitute, nitrogen or steam.  Water or steam injection can also be used for special cases.
  
• Built-in backup charges, can be either automatically or manually activated.
  
• Widely used on offshore platforms, LNG and petrochem applications.

VENT TIP & FIRE SUPPRESSION TESTING -- Dispersion, Heat, Radiation &  Snuffing

NAO offers testing services for vent dispersion (or flare dispersion in the event of a FLAME OUT), heat & radiation studies and flame snuffing effectiveness.  Testing can be done with a wide range of gases and flow rates.  Even entrained liquids can be simulated in the testing.

For more information, please call, fax or Email for typical drawings, technical reports, price and brochures.

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