Rescue, Safety & Industrial

Delivered from outside the tank, consideration must be given to "fallout" of a Type 3 application — the water/foam solution that does not land inside the tank due to wind or general stream erosion from the ground assault. The benefit of a fixed system "Type 2 Application" is a potential increase in foam application density, ie: gallons-per-minute required per square foot of storage tank surface area. Mounted to the rim of the tank, the AMBUSH™ configuration delivers a Type 3 Application toward the center of the tank for full surface protection, while simultaneously delivering lateral Type 2 application streams along the tank wall for seal fire protection. The elevated position of the AMBUSH™ system at the tank rim reduces / eliminates wind erosion and delivers a more forceful seal area application — reducing application times and using less water and foam concentrate than a strict "Type 3 Application".

As a fixed system component, the AMBUSH™ provides a quicker response time and less man power than a portable large volume delivery approach. Also, as a fixed system the AMBUSH™ requires less flow rate due to lower recommended application densities (gpm per ft2 of surface area exposed). Finally, use of the system requires less specialized training and exposes less personnel to a hazardous situation.

The AMBUSH™ System is available in several different sizes. Each size functions similarly. The stream is broken into 4 components. The left/right discharge streams are equal to each other and deliver foam left/right of the unit against the tank wall. The upper stream discharges foam at a slight angle toward the center of the tank. The fourth stream discharges foam back against the tank’s shell and protects the area just below the unit with a small stream.

As the multiple foam streams projecting toward the center of the tank converge, they extinguish the fire in the center of the tank then build back toward the tank’s shell. At the same time, the left/right streams project foam around the circumference of the tank extinguishing any fire near the tank shell. As the tank shell fire is extinguished, this coverage begins to grow toward the center of the tank to meet the foam blanket being established by the upper stream. Soon after, the entire tank will have a full foam blanket.