Full Description

The purpose of this Technical Information Paper (TIP) is to provide a reference basis from which paper machinevacuum system airflow requirements may be calculated. Air flow sizing requirements for fourdriniers, presssections, tissue formers and cylinder machines are presented.

Selection (vacuum factors) factors given in this TIP are only guidelines. Paper machine dewatering capability shouldbe evaluated besides calculating existing vacuum factors because there are many variables affecting sheetdewatering besides vacuum capacity and resulting vacuum levels. Vacuum system suppliers, machine builders, orapplication specialists should be consulted for accurate sizing and for specific applications. Dewatering performanceof formers and presses should be compared to industry standards (see TIP 0404-47 on paper machine performance)before consideration of adding vacuum capacity to meet the "TAPPI Factors."

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Published: 2013 Number of Pages: 19File Size: 1 file , 470 KB