Over the past 40 years, the ES-type screw conveyor has become synonymous with cement conveying and feeding in batching plants worldwide. During this period, WAM has supplied more than half a million units, many of which have been in continuous operation ever since. Since the beginning of the new millennium, it has become difficult to find a batching plant cement manufacturer anywhere in the world that does not recognize and value the ES’s unmatched technical features and quality.