Fast Flow Extinguishers: Difference between revisions

Revision as of 12:53, 13 July 2007

Revision as of 01:15, 30 September 2007

Line 4:

These extinguishers have a higher dry chemical flow rate then conventional extinguishers. In other words a fast flow extinguisher expels a higher volume of agent in less time than a standard compliance flow extinguisher. As a result fast flow extinguishers have lower [[UL]] class A&B ratings than compliance flow extinguishers(the class B numerical rating is the approximate square feet of burning fuel a [[novice]] operator could expect to extinguish). UL Class B tests are conducted on fuel in depth fires in what is known as a burn pan. Burn pans come in various

sizes (square feet) in relation to what UL rating aan extinguisher will receive for successfully extinguishing it. The larger the burn pan fire, the larger the rating and the longer the extinguisher must discharge to be able to handle the larger volume of fire before running out. For a given size extinguisher the resulting effect is a lower flow rate, resulting in a higher UL rating.

''Generally for same size extinguishers (agent capacity)''

-High UL rating = Low flow rate