By Michael Volk
"This e-book deals a pragmatic advent to pumps and offers the instruments essential to decide upon, dimension, function, and continue pumps accurately. It highlights the interrelatedness of pump engineering from approach and piping layout to deploy and startup. It presents new case reviews designed to teach real-world functions. The book's artwork application has been redone, with all figures now showing in complete colour It is additionally an outstanding textual content for upper-level undergraduate and graduate scholars in departments of mechanical engineering, mechanical engineering expertise, or engineering technology"-- Read more...
summary: "This publication deals a realistic creation to pumps and offers the instruments essential to pick out, measurement, function, and retain pumps correctly. It highlights the interrelatedness of pump engineering from process and piping layout to deploy and startup. It presents new case reports designed to teach real-world functions. The book's artwork software has been redone, with all figures now showing in complete colour it's also an exceptional textual content for upper-level undergraduate and graduate scholars in departments of mechanical engineering, mechanical engineering know-how, or engineering know-how"
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Extra resources for Pump characteristics and applications
Finally, peristaltic pumps are not as accurate for metering as reciprocating style pumps. 15). The stator is made of an elastomeric material, and the rotor has an interference fit inside the stator. As the rotor rotates inside the stator, cavities form at the suction end of the stator, with one cavity closing as the other opens. The cavities progress axially from one end of the stator to the other as the rotor turns, moving the liquid through the pump. Advantages of PC pumps include their ability to pump highly viscous liquids (as well as very low viscosity liquids), shear sensitive liquids, fragile solids, and abrasives.
The amount of slip varies widely from one PD pump to another, as well as varying with pump differential pressure, with the liquid viscosity, and with internal clearances. Most PD pumps are not nearly as subject to increased leakage back to suction because of wear as are centrifugal pumps. Some types exhibit very little slip. These factors make some types of PD pumps ideal for metering applications, where an accurate, controllable flow rate of (usually) an expensive chemical must be dispensed, for example, to treat water with chlorine.
Usually, it is recommended that PD pumps incorporate a pressure relief valve, built into the pump or supplied just downstream of the pump, to protect against overpressurization. Internal relief valves built into the pump relieve pressure via an internal loop that connects discharge to suction. External valves must be piped to an external source, generally the supply reservoir. The external approach can provide a visual indicating that the valve is open. Relief valve settings are sometimes adjustable and can be tricky.
Pump characteristics and applications by Michael Volk