What are the criteria for sealing up a DuPont™ FM-200® protected space and how quickly must the door to a linear accelerator space, for example, close prior to release of the gas?
Because DuPont™ FM-200® is a gas, it will flow freely wherever the air goes. This is one feature that makes DuPont™ FM-200® extremely effective in getting into and around complex structures, finding and extinguishing fires in the deepest recesses. It will, however, also leak out of the space with equal ease. Generally it is recommended that doors and significant openings be closed prior to the discharge of the agent. This includes ventilation dampers, windows, and other normal openings. For the integrity of the space, we recommend performing a room integrity test with a door fan unit. With all of the normal openings closed, the door fan provides a slight positive and negative pressure to the space and calculates the total cumulative volume of openings. Using this data allows us to derive a hold time for the agent concentration. Hold time requirements are usually set by the AHJ and most conventional enclosures look for ten minutes. This ensures thorough extinguishment and minimizes the
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