KSB RDLO axially split case water pump series

The RDLO series of axially split case water pumps offers hydraulic efficiencies up to 91% at BEP, using double volute casings and three different impeller profiles in most sizes for optimum selection and hydraulic stability.

Easier maintenance was a major design factor with features including various material options on all components, casing and impeller wear rings, a dry sealed shaft arrangement with a short bearing span secured with one outboard locknut (enabling right and left hand drive with common components), and O-ring sealed shaft sleeves. A major benefit of the shafting design is there are no wetted threaded shaft components to seize up, and all wetted shaft components are stainless steel for a long service life.

The pumps also have field-replaceable seal chambers and bearing housings bolted to the top and bottom casing.

Design changes include much thicker casing half joints, with a minimum thickness of 80 mm, the use of a sealing compound in lieu of the traditional case gasket and the use of much larger diameter, high-tensile bolts in lieu of a stud and nut design that can take hours to clean around and prepare. Self-aligning casing halves and preset DIN standard mechanical seals are also part of the design.