Processing Magazine

Continuous weigh feeders deliver accurate gravimetric feeding

February 28, 2007

Metalfab, Inc. has announced availability of its Better-Weigh® Continuous Feeders for gravimetric feeding of dry bulk materials where it is necessary to determine actual feed rates on a loss-of-weight basis. Available in seven models with feed rates from 1 to 550 cu. ft./hr. (larger sizes available), Better-Weigh® Feeders are designed to provide feeding in either batch or continuous mode depending upon the arrangement of the feeder''s control electronics. In batch mode, the batch controller is used to control the fast (bulk) and slow (dribble) speeds of the feeder. Accuracies of + 0.5 percent can be easily achieved in 2 pounds or less batches, and + 0.25 percent with 3 pounds or greater batches with time spans of 30 to 90 seconds. In continuous mode, the feeder''s electronic controller is used to constantly monitor loss of weight of material per time in order to maintain a continuous loss of weight with an accuracy of + 0.25 to 0.50 percent. Standard features include a platform or lever balance scale, sealed tactile keyboard, 7 digit numerical keyboard, automatic manual batching, and 2 or 5 cu. ft. hopper. Sanitary construction is also available.