Press Fabric Dewatering and Conditioning - Suction box (Uhle box) Design and Vacuum Requirements

Design considerations for dewatering press fabrics to permit selection of slot widths, Uhle box sizing and determination of vacuum requirements are discussed in this TIP. Recommended vacuum factors are provided for calculation of Uhle box vacuum capacity. System design considerations for piping, separation and vacuum equipment are included. Notes: Press showering is discussed in TIP 0404-61 “Paper Machine Shower Recommendations.” Chemical cleaning considerations are described in TIP 0404-65 “Chemical Cleaning Guide for Press Fabrics.”