Omac has developed its Series C and introduces three new models: C110, C115 and C270, whose volumetric capacity if 0,17 l/rev, 0,21 l/rev and 0,38 l/rev respectively for maximum pressure from 5 to 13 bar with increased clearances rotors. C110 and C115 models are provided with DN40 connections, while the C270 model is provided with DN50 connections. Designed to attain the highest hygienic standard, the lobe pumps are as easily fully cleanable as to enable hot water consumption and reduce the use of chemical products for their cleaning. The materials used, surface finishing and all the characteristics of the design have enabled to get the European Hygienic Engineering & Design Group – EHEDG certification. All parts that come into contact with the product are made in stainless steel 1.4404, pump body is cast with integral connections without welding. The rotors have been designed as to reach the best efficiency and cause less damage to the product at the same time. Two kinds of rotors are so far proposed: four-lobes and dual wing (bi-lobes) with new design.