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2 / March 2020 powderbulk.com Powder and Bulk Engineering (ISSN 0897-6627) is published monthly, twelve times per year by CSC Publishing Inc., 1155 Northland Drive, St. Paul, MN 55120. Periodicals postage paid at St. Paul, MN and additional mailing office. POSTMASTER: Send address changes to Powder and Bulk Engineering, 1155 Northland Drive, St. Paul, MN 55120. March 2020 | Volume 34 Number 3 www.powderbulk.com T H E AU T H O R I T Y S I N C E 1 9 8 7 COVER FEATURES 18 Pneumatic Points to Ponder: Pneumatic conveying system pipeline routing Jack D. Hilbert 44 Test center: Testing leads to custom- engineered material ow equipment 10 Industry news 15 Markets update 25 Special section: Bin level indicators 49 Calendar 51 Continuing education 54 What's new 55 Supplier notes 56 People news 56 Product news 58 Advertiser index 59 Classi ed advertising DEPARTMENTS INDUSTRY PERSPECTIVE 8 DHAs: 6 months and counting Jack Osborn PNEUMATIC CONVEYING 27 Static versus dynamic velocity control: Which is more bene cial in dilute-phase pneumatic conveying? Jonathan Thorn 34 Custom solutions not necessarily required for pre-engineered vacuum conveying systems Doan Pendleton 38 Focus products 60 Suppliers' tips Suppliers discuss ways to maintain an ef cient vacuum pneumatic conveying system. GENERAL FEATURES 42 Case history: Company cures cement powder ow issues with uidizers 46 Nanotechnology 47 Show preview: IAOM Conference & Expo 48 Show preview: Interphex 44 42 On the cover: VS350 pneumatic vacuum conveyor transferring powder from a uid-bed dryer to a drum using high contain- ment in a pharmaceutical application. Pneumatic conveyor has a remote-mounted vacuum pump and a piston vibrator discharg- ing through a rotary airlock with a vent. Pneumatic conveyor is constructed from Type 316L stainless steel, and its post hoist allows simple, contained docking of the receiver unit to the drum. Courtesy of Volkmann, Bristol, PA, 609-265-0101 (www. volkmannusa.com).