The circulation Attritor is used for difficult to grind and disperse materials and for the ultimate in micron size and quality. The main advantage of the “Q” series is the very narrow particle size distribution that can be achieved. Large quantities of material can be ground with a smaller investment of grinding media and Attritor equipment. The slurry can be continuously monitored. Additional ingredients can be added to the premix tank at any time during the grinding, with sensitive materials being added near the end of the grinding cycle. Excellent temperature control is possible, since the slurry spends only 20-30 seconds in the grinding chamber and has plenty of time to be stabilized in the holding tank. “Q” series Attritors are available in sizes ranging from the laboratory size Q-2 model up to the large-scale production model Q-100. For very large production, several Q-100 Attritors can be hooked up to a single holding tank. Circulation Attritors designated as “QL” include specially configured arms and disks for special applications and increased performance. A variety of accessories meeting different conditions, from cover seals for a totally enclosed system to metal-free systems, are available. Standard Features n Special 450% starting torque, 2-speed, 2-winding motors for easy startup and cleaning n Standard (TEFC) or explosion-proof electric motor and controls n Grinding tank (304SS) jacketed for heating or cooling n Tank swivels for shaft removal and cleaning n 4140 steel shaft with hardened tool steel agitator arms n Media discharge valve n Choice of variable-speed gear pump or air diaphragm pump “Q” and “QL” SERIES Special Options n Tank Linings —special linings for metal-free grinding are available. Choose from ceramic (alumina) tiles, food-grade rubber or polyurethane. n Arm Sleeves —to accommodate metal-free systems, shaft arms may be sleeved with plastic, tungsten carbide, or zirconium oxide. n Covers —can be equipped with a floating shaft seal to minimize solvent loss, or can be equipped with a MECO shaft seal for grinding under inert gases, complete with a product charging port, gas inlet and outlet. n Torque Meter —for monitoring precise energy consumption which is used for determining grinding time and for added quality control. n Stationary Arms —for high viscosity materials Q-100 Q-6 (with holding tank)