VERDERHUS Screw Centrifugal Pumps
VERDERHUS screw centrifugal pumps combine the feature of centrifugal and positive displacement pumps to gain low head, high flow pumping. Each Verderhus pump has a large clearance open screw impeller allow to pump large solid, high solid content viscous liquids, with gently feeding, low NPSH low energy consumption and ownership cost. Additionally, the Verderhus pumps long fibre in suspension with much reduced clogging frequencies. Verderhus screw centrifugal pump are being successfully used in many industries such as Biogas production system, chemical processing, construction, food & beverage, mining and quarrying, pulp & paper , power station, waste treatment and available with flow max. 1500 m3/h, Head max. 55 mwc solid content to 10% sludge, 30% slurry, viscosities up to 3000 cps and ATEX certified motor. Standard material construction of Verderhus pumps is cast iron and available with 316SS construction as option. Wear resistant double “back to back “ mechanical seal with intermediate seal cooling oil chamber as the standard seal of Venderhus pumps, the sealing option such as gland packing, API seal flushing schemes, special seal face material-elastomer combination are able to be provided. Material option for pumping abrasive and corrosive media to resist cavitation, are coating including PU and Rilsan, tufftride ferritic nitrocarburised case hardened cast iron impeller and casing (64HRC to 50 µm), plasma nitride hardened stainless steel impeller and casing, suction cone cutter grooves.
Pump variants of Verderhus are horizontal close and long coupled for wet and dry pumping, vertical submerged, and submersible pump. Verderhus has already done the pumping solution for pumping lime, industrial oils, kaolin slurry, malt, salt and lime suspension, quartz sand.