Download Centrifugal and rotary pumps: fundamentals with applications by Lev Nelik PDF

By Lev Nelik

Centrifugal and Rotary Pumps bargains either execs and scholars a concise reference detailing the layout, functionality, and ideas of operation of the several pumps kinds outlined by way of the Hydraulic Institute. From historic heritage to the most recent traits and technological advancements, the writer specializes in details with real-world practicality and methods you could enforce immediately.Beginning with the basics, the textual content then shifts to actual box instances that deal with functions, pumpage, procedure interplay, reliability, failure research, and sensible options. by means of together with specification parameters and standards for the appliance of assorted pumps, this finished publication presents helpful and well timed fabric that plant engineers, upkeep employees, operators can use and percentage with colleagues.

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Extra resources for Centrifugal and rotary pumps: fundamentals with applications

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Galling is wear by adhesion of material from one part onto the other and is characteristic of stainless steel sliding against a similar metal under load. Wearplates can also be used when there is no hydrodynamic film on the ends of the gears. The wearplates will then be made from a material with good boundary lubrication characteristics, such as carbon or bronze. Wear seldom occurs to the teeth of steel or cast iron gears unless there are abrasives present in the liquid, or when the gear teeth are heavily loaded and the material that they are made from does not have the strength necessary to resist deterioration of the tooth surface.

Wearplates can be used between the ends of the gears and the housing when the combination of gear and housing material could cause wear or galling problems. Galling is wear by adhesion of material from one part onto the other and is characteristic of stainless steel sliding against a similar metal under load. Wearplates can also be used when there is no hydrodynamic film on the ends of the gears. The wearplates will then be made from a material with good boundary lubrication characteristics, such as carbon or bronze.

The flow requirements in many applications change continuously: the production requirements change, different ©1999 CRC Press LLC liquids require different amounts of additives to the process, etc. A common and simple way to change the flow is to open or close the discharge valve; however, this method is also the least efficient. As we shall see later, for a type of pump in Quiz #1, a 20% reduction in flow may cause a 10 to 12% loss in efficiency, and this costs money. QUIZ #2 — HOW MUCH MONEY DID A MAINTENANCE MECHANIC SAVE HIS PLANT?

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