Understand a ColdFog® System
A ColdFog® system is a completely self-contained system capable of generating man-made water fog for humidification, cooling, special effects and other applications.
The ColdFog®fog system is complete with pump, motor, water filters, control panel, nozzles, tubing, operating manual and water treatment package. Working pressure is 400-3200 psi (adjustable). A typical ColdFog® system is shown below.
We offer the world’s only PATENTED ruby-orifice fog nozzles with 9 kinds of diameters:
| Nozzles | Orifice in Inches |
Orifice in Metric |
Flow Rate at 1000 psi |
| ASI-4R | 0.0040″ | 0.11 mm | 0.014 gpm |
| ASI-45R | 0.0045″ | 0.11 mm | 0.017 gpm |
| ASI-5R | 0.0050″ | 0.13 mm | 0.020 gpm |
| ASI-55R | 0.0055″ | 0.14 mm | 0.025 gpm |
| ASI-6R* | 0.0060″ | 0.15 mm | 0.026 gpm |
| ASI-8R | 0.0080″ | 0.20 mm | 0.046 gpm |
| ASI-10R | 0.0100″ | 0.25 mm | 0.072 gpm |
| ASI-12R | 0.0120″ | 0.30 mm | 0.092 gpm |
| ASI-15R | 0.0150″ | 0.38 mm | 0.120 gpm |
| Notes: *standard nozzle orifice size: 0.006″(.15mm). gpm = gallon per minute. |
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The nozzle consists of a 316 stainless steel body with ruby-orifice, 316SS impingement pin and extended polypropylene filter to avoid trapping particles in the base of the nozzle. High-pressure water (400-3200 psi) reaches the nozzle, shooting a fine liquid jet against an impingement pin of equal diameter resulting in the finest atomization possible, atomizing water into billions of 1 to 15 micron droplets like those occurring in natural fog.
Ruby-orifice nozzle spray shown below:
The degree of atomization (the size of water droplets) produced by a nozzle can be divided into the ranges shown below, comparing with known droplet diameters for different types of precipitation:
| Type of Precipitation | Size of Droplet (Microns) |
| Fog | 1-30 |
| Mist | 30-100 |
| Drizzle | 100-300 |
| Light Rain | 300-1000 |
| Heavy Rain | 1000-5000 |
| Note: 1 = 25,400 Microns (µm) | |
Using our patented ruby-orifice nozzle, you now get precise flows and predictable fog for your applications. Droplet analysis sheets will be supplied upon request. ASI-6R nozzle droplet analysis shown below,
Why Does the ColdFog® Ruby-Orifice Nozzle Have Such a Long Life?
Brass or ordinary stainless steel orifice nozzles have a relative life, since the passage of water under high pressure will enlarge the orifice in a short period of use. Nozzle wear is characterized by an increase in nozzle flow, followed by a general deterioration of the spray pattern, increased droplet size and loss of system efficiency. ASI ruby-orifice nozzles have Lifetime Unconditional Orifice-Wear Warranty.
| Typical Nozzle Orifice Materials |
Approx. Abrasion Resistance Ratios |
| Brass | 1 |
| Steel | 1.5 to 2 |
| Monel | 2 to 3 |
| Stainless Steel | 4 to 6 |
| Hardened Stainless Steel | 10 to 15 |
| Ruby | >120 |
