Three gigantic melt filters have left the plant of the Kreyenborg GmbH, Münster/Germany. The systems of the type series Poly have been designed for the use in world-scale polymerisation lines instead of conventional candle filters. The biggest version is the Poly 6000 x 4, which has a total filtration area of 24 000 cm², resulting from 6000 cm² in each of the four pistons. Depending on material and viscosity the throughput amounts to up to 45 000 kg/h. The three machines of this size will be applied with PET production in the MTR- process of Uhde Inventa-Fischer. Two filters have been delivered to Indorama in Alabama, USA, the third screen changer has been shipped to Alco-Naphta LLC in Kalinin-grad, Russia. The first screen changer will be brought on line in the course of next year.
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