Our Goal was to develop a method to perform the Annual Foam Proportioning Test.
A method that would be approved through NFPA AND Factory Mutual approvals
that would eliminate the environmental concerns of discarding Foam or Test Liquids
This would eliminate the expense of flowing and replacing foam concentrate, and
remove the cost of trucking and disposal of the foam concentrate.
Allowing us to flow low, midrange and high range of the proportioner.
What We Do
The method relies on an initial foam system discharge test to establish that the system is working properly and to
determine the concentration the proportioner is developing. This test is conducted in the same fashion as any other foam
proportioning system acceptance test. This test is immediately followed by a water equivalency test at the exact same
conditions as the initial foam discharge test.
A water equivalency test essentially replaces the foam concentrate supply to the proportioner with water. The flowrate
of the system and the flowrate of the water used in place of the concentrate are both measured with precision flow
meters, and a pseudo proportioning rate is established. In general, the proportioning rate of water is higher then the
corresponding proportioning rate of concentrate, typically by about 20 percent.
The proportioning system can then be tested in the future by repeating a water equivalency test and comparing the
results to the initial water equivalency test. Flow of foam concentrate is not necessary.