Fast Flow Extinguishers: Difference between revisions

Revision as of 03:08, 3 June 2007

Revision as of 04:36, 4 June 2007

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These extinguishers have a higher dry chemical flow rate then conventional extinguishers. In other words a fast flow extinguishers expelles 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 aproximate 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 a extinguisher will recive for sucessfully extinguishing it. The larger the burn pan fire, the larger the rating and the longer the extinguisher must discharge to be vbleable 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.

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