Hot Water Recirculation Pump, HPKL

Hot Water Recirculation Pump, HPKL


KSB Pumps Limited has launched a new generation of Hot Water Recirculation Pumps for large industrial heating systems as well as forced circulation boilers and district heating systems. The horizontal, radially split single-stage volute casing pumps feature a back pull-out design. Their ratings and dimensions comply with ISO 2858; with regard to handling hot water, organic or synthetic heat transfer fluids, they also meet the technical requirements of ISO 5199. The HPK-L pump series, which comes in 49 different sizes, can be operated at temperatures of up to 400°C without any additional cooling devices, and is designed for pressure classes of up to PN 40. This temperature resistance is achieved by means of a generously sized heat barrier, which separates the pump set’s hot operating section from the air-cooled mechanical seal chamber. A fan impeller fitted at the pump shaft end generates a continuous flow of air between the large cooling fins surrounding the mechanical seal chamber. A service life of up to 25,000 operating hours is ensured by large, product-lubricated silicon carbide plain bearings fitted close to the impeller and by two angular contact ball bearings in back-to-back arrangement sealed on both sides and mounted at the “cold” end of the shaft.

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