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- W72063668 abstract "SELECTING motor-driven centrifugal pumps, it is advisable to specify the highest possible unit efficiency so that the greatest output for the least cost may be obtained the saving in power cost per percentage efficiency being directly proportional to the size of the unit. The purchaser should, however, carefully ascertain that the initial efficiency is not based on excessively small ring clearances in the pump. Having installed efficient pumps, it is important to maintain the initial efficiency and hold power costs to a minimum in maintaining the maximum output. The reliability of a pumping unit is of greater importance than the actual percentage efficiency, and careful maintenance of all appurtenant equipment, including motor, controls, and circuits, should be closely observed so that the pumping unit may at all times be ready to serve. For efficient operation of a pumping unit, it is necessary that a certain amount of auxiliary equipment be furnished. This equipment should include suction and discharge gages, of both indicating and recording types if possible. The indicating gage is used for frequent visible check-ups on the pump performances, and the charts produced by the recording gage are kept as a permanent record. If the installation does not warrant the use of both types, the recording gage is preferable because it may be used to serve both purposes. Some flow metering device such as the Venturi type meter, having both indicating and recording attachments, should also be included in the auxiliary equipment. The use of such a device makes it possible for the operator to determine the output of the pump at any time, and also gives a pumpage record which can be used in conjunction with the suction and discharge gage charts to determine the actual output of the pump over a period of operation. The indicating portion of the flowmeter is also useful in showing the operator that his pump is not clogged, since such clogging would" @default.
- W72063668 created "2016-06-24" @default.
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- W72063668 date "2016-01-01" @default.
- W72063668 modified "2023-09-27" @default.
- W72063668 title "Maintaining Efficiency of Motor-Driven Centrifugal Pumps [with Discussion]" @default.
- W72063668 hasPublicationYear "2016" @default.
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