Paper machines functioning above 2500 ft/min use a special, high pressure heatbox called as _________

Paper machines functioning above 2500 ft/min use a special, high pressure heatbox called as _________ Correct Answer Hydraulic heatbox

High pressure heatbox called as a hydraulic heatbox. These heatboxes don’t use rectifier rolls because the high turbulence that’s generated with these rolls causes formation problems beyond the heatbox.
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