Until 2013, a German ceramics manufacturer used a progressing cavity pump for filling and recirculation of the storage tanks for grog and ceramic slip. The wear parts of this pump, however, had to be replaced every three months due to the highly viscous and abrasive substance. To minimise service times and enable more economical production, NETZSCH Pumpen & Systeme GmbH from Waldkraiburg/Germany suggested replacing the unit with a special rotary lobe pump from the TORNADO® T2 range. The T.Proc® is specially designed for a long service life with minimum wear, so that it can also convey highly abrasive compounds without problems. This is made possible by the combination of the operating principle and a special material pairing, which is only offered by NETZSCH: instead of conventional elastomer lobes in a metal housing, this pump comprises two steel lobes rotating in a replaceable rubber housing insert. This achieves a higher durability of the moving components because steel is less susceptible to material fatigue from dynamic forces than plastic elastomer. In addition, the interior is designed without dead space so no slip residue can adhere. Due to the clearly reduced wear and the longer service life of 1 and 1.5 years, respectively, the ceramics manufacturer has now changed over its entire production to the TORNADO T.Proc®.