Friday, November 20, 2009

Understanding CAFS Performance

Published Tuesday, September 09, 2008

Some departments view compressed-air foam systems as extensions of standard apparatus water pump systems. They assume that all the performance ratings and conditions that apply to water pump systems also apply to CAFS. That is not true. Here is a summary of some of the factors used to determine CAFS performance. Flow and pressure ratings. NFPA 1901 rates pumps used on structural apparatus in terms of water flow rates at pressures of 150, 200 and 250 psi. A minimum rating of 250 gpm at 150 psi is required. NFPA 1906 rates pumps used on wildland apparatus ...

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