ABSTRACT
Many customers, such as consulting engineering firms or large-volume buyers, find it advisable to develop "prefabricated" specifications for a variety of centrifugal pump services, such as boiler feed, heater drain, condensate, ash sluicing, and circulating water. A centrifugal pump is a velocity machine. There are a number of individual pump characteristics, particularly those having to do with various pump losses, that are responsive to such parameters as the Reynolds number. Reduction in atmospheric pressure at higher elevations makes it necessary to consider this carefully in the location of a pump in regard to the suction water level. For liquids other than cold water, divide the reduction in atmospheric pressure indicated on the chart by the specific gravity of the liquid at the pumping temperature. All pressures and heads must be expressed in feet of the liquid at the pumping temperature with the proper algebraic sign.
