08/10 Challenge A 12’ diameter Yankee dryer in Canada, operating at speeds up to 5500 fpm, was experiencing limited drying capacity and non-uniform cross-machine sheet moisture profiles. The dryer had a plain shell with no internal ribs to increase its drying rate. Solution Kadant Johnson developed a unique configuration of Turbulator Tube bars specifically for plain shell Yankee dryer applications. Yankee dryer Turbulator bars must have enhanced features to ensure that the bars remain in place during operation. Yankee dryers operate with one or two pressure rolls loaded directly against the dryer shell. These rolls deflect the shell as it passes through the nip. Turbulator bars must be able to accommodate this repeated shell deflection. Yankee Turbulator bar

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