Direct Sanding System for Locomotives Series 670 The Series 670 Direct Sanding System for Locomotives includes a hopper with integral dust collection and a transporter to convey traction silica sand from a hopper direct to the locomotive. Included is a lling wand and counterweighted hose in addition to an automatic shut off valve to stop conveying when the locomotive is completely lled. The controls include an Allen Bradley programmable logic controller for all operating functions. The compact preassembled modular design ts easily between two rail lines and is completely dust tight and weather tight for even the most severe of applications. Bulletin 21128-T (dm) © 2011 Dynamic Air Inc. Dynamic Air Conveying Systems is a registered trademark of Dynamic Air Inc., St. Paul, MN. Corporate Headquarters Dynamic Air Inc. • St. Paul, MN USA • +1 651 484-2900 Worldwide Ofces Australia • Brazil • China • United Kingdom www.dynamicair.com