Fire extinguishing nozzle selection table

The table below summarises much of the information in the fire extinguishing nozzle section of the SNP website.  It is intended to be a handy reference guide to aid nozzle selection.  Full data on each of the nozzles listed can be accessed by clicking on the boxes in the left hand column of the table below.  The data sheets will open in a separate tab to allow easy comparisons between multiple product sheets.

 

 

Nozzle Type

 

 

Design Type

 

 

Spray Characteristics

 

 

Fire Extinguishing uses

 

 

Flow rates

 

 

Notes

 

 

Fire fighting spiral nozzle

 

 

Spiral

 

 

Fine droplets mixed with some heavier droplets

 

Full cone pattern

 

 

Sprinkling/ deluge

 

 

9.67-1720

 

 

Protective sheath

 

Lloyds, FM and UL       approved

 

 

 

Ultra wide angle spiral nozzle

 

 

Spiral

 

 

Fine droplets mixed with some heavier droplets

 

Full cone pattern

 

Very wide 180 degree spray angle

 

 

Sprinkling/ deluge

 

 

12.3-255

 

 

Very wide spray angle reduces the number of nozzles needed.

 

 

PJ series Low profile misting nozzle

 

 

Impingement mist nozzle

 

 

Fog pattern

 

Very fine droplets

 

 

Misting / halon replacement

 

 

0.043-5.34

 

 

Can operate effectively at 2 BAR fluid pressure.

 

 

Microwhirl misting nozzle

 

 

Small orifice

 

 

Fog pattern

 

Very fine droplets

 

Low flow rate

 

 

Misting / halon replacement

 

 

0.032-0.517

 

 

Drip free

 

Requires minimum of 7 BAR

 

 

MHW multi headed misting nozzle

 

 

Multiple small orifice

 

 

Fog pattern very fine droplets

 

 

 

Misting / halon replacement

 

 

4.2-8.7

 

 

Drip free

 

Manifold

 with multiple Microwhirl nozzles

 

Minimum of 70BAR pressure.

 

 

Fire Extinguishing Engineering Considerations:

Fire Extinguishing Nozzle Designs: