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Harold Engineering provides a substantial variety of calorifiers, buffer tanks and warm water cylinders produced in Italy by Cordivari. The Cordivari Group was started in 1972 and constant financial investment in R&D ever since has actually guaranteed that the Cordivari item variety has actually remained at the leading edge of item advancement in the water heating market. Cordivari established the Polywarm ® series back in 2003 with the warm water cylinder being made in carbon steel which is then internally lined with an unique polymer surface and is treated at 230oC. These calorifiers are flexible - unlike glass-lined cylinders which struggle with transport damage, pipeline connection thread damage, thermal shock and break-down of the lining at the bonded seams on the within the tanks.
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