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TIP 0502-01: Paper Machine Vacuum System Selection Factors

The purpose of this Technical Information Paper (TIP) is to provide a reference basis from which paper machine vacuum system airflow requirements may be calculated. Air flow sizing requirements for fourdriniers, press sections, tissue formers and cylinder machines are presented. Considering various gap and twin wire formers which are available, it is not possible to develop a document for every former configuration.

Selection (vacuum factors) factors given in this TIP are only guidelines. Vacuum airflow and resulting vacuum levels are just part of what can influence sheet dewatering – other important factors include machine speed, forming and press fabrics, former/press configuration, roll covers, furnish (or water retention value), refining and nip impulse. Vacuum system suppliers, machine builders, or application specialists should be consulted for accurate sizing and for specific applications. 

Publishing date: April 2022

Purchasing link: https://imisrise.tappi.org/TAPPI/Products/01/0108050201.aspx 

Working Group:

Doug Sweet, P.E. – Chair, Doug Sweet & Associates, Inc.
John Neun, John A. Neun, LLC
Charles H. Wunner, VOONER
Steve Wiseman, Yates Engineering
Clay Arnold, James Ross
Paula Hajakian, US Gypsum

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