HIGH EXPANSION GENERATORS

The NF-HEFG, High Expansion Foam Generators are powered by a water turbine. These are designed to expand the foam solution with Expansion ratios up to 1000:1, depending upon the solution flow rate and the water pressure. However, the optimum expansion ratio is in the range of 500:1 up to 700:1. The High Expansion Foam Generator requires no other source of power such as electricity or gasoline engines. They are powered by the foam solution driving a hydraulic (water) motor or turbine. 

The expansion of foam solution is achieved by spraying the solution onto a nylon net/stainless steel screen, then an air stream created by the fan attached to the motor blows air through the screen to produce a mass of foam bubbles.

The continuous flow of the foam solution plus the movement of air through the screen will produce large volumes of finished foam. Portable systems are having its own proportioning system whereas the fixed systems are to be used with the fixed proportioning system. A pressure gauge is provided at the foam solution inlet. The design of the NF-HEFG-500L is such that a single nozzle with a large diameter orifice sprays foam solution across the aeration screen. The incorporation of this nozzle prevents clogging, thereby ensuring an uninterrupted foam discharge, almost irrespective of the water quality.