Peter Schüten is a Product Manager with Almatec® Maschinenbau GmbH, Duisburg, Germany. He can be reached at [email protected] or +49 2065 89205-0. Almatec is a leading manufacturer of air operated double-diaphragm (AODD) pumps, owns numerous patents and offers a wide range of pneumatic diaphragm pumps. Almatec is product brand of PSG®, a Dover company, Oakbrook Terrace, IL, USA.