Two UK-based companies have worked together to produce a fireproof enclosure that can tolerate temperatures as high as 1,093oC for 30 minutes, while maintaining an internal temperature of 87oC. A co-development of Cooper Crouse-Hinds and Thermal Designs UK, the type 316 stainless steel STB heavy-duty junction box (600mm x 400mm x 220mm) is coated externally with Thermal Designs’ K-MASS, an intumescent, moulded-on protective coating that is certified to UL 1709.STB is an ATEX-certified heavy duty junction box that is fully compliant with the impact, thermal and ingress protection requirements of EN50014. It is available in a wide range of sizes, with custom fittings such as cable glands, breather drains and blanking plugs. Suitably certified components such as instrument transmitters and fieldbus modules can also be accommodated within the STB enclosure.
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