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Temperature Range for H3R Aviation Fire Extinguishers


Jul 8, 2021
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Our Halon extinguishers have a storage temperature range from -40° F to 120° F. These figures are noted on the extinguishers’ UL nameplate. These are industry standard temperature ranges for these types of extinguishers.

It is worth noting that our cylinders are robust, and meet the requirements outlined in DOT 49 CFR - CHAPTER I - 173.309, which states, in part, “Each fire extinguisher must be tested, without evidence of failure or damage, to at least three times its charged pressure at 21 °C (70 °F) but not less than 825 kPa (120 psig) before initial shipment.” Fire extinguishers are required to be pressure tested to three times the normal operating pressure and our extinguishers are actually tested to 6 times the operating pressure.

Furthermore, all UL listed fire extinguishers direct the user to be installed, inspected and maintained in accordance with NFPA code 10. NFPA 10 calls for extinguishers to be inspected monthly (or more often if circumstances dictate) to make sure they are properly charged. Following these requirements should give you a measure of comfort that the extinguisher will work when it needs to. However, it is important to note that regular exposure to temperatures of above 120° F may cause premature wear on the rubber seals, causing them to fail prematurely, resulting in a loss of pressure. NFPA No. 10 stipulates that extinguishers exposed to temperatures above 120° F should be subjected to an annual teardown. Essentially, this is having the 6 year maintenance done annually.

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