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Section 2.1.1 - Centrifugal Pump Theory - Nomenclature
By Igor Karassik, Joseph Messina, Paul Cooper, Charles Heald
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Section 2.1.1 - Centrifugal Pump Theory - Nomenclature
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From Pump Handbook 4th Edition


NOTE: The units for each quantity defined are as stated in this nomenclature, unless otherwise
specifically stated in the text, equations, figures, or tables.

 
A
=area, ft2 (m2).
 
a
=constant of the diffuser or volute configuration in Pfleiderer’s
  slip relation.
 
a
=radius of impeller disk, ft (m), = rt, 2.
 
Ap
=area of flow passage normal to the flow direction, ft2 (m2).
 
b
=width of an impeller or other bladed passage in the meridional
   plane, ft (m).

NOTE: When dealing with radial thrust, b2 includes also the thickness of the shrouds.

     

     
             

NOTE: In a polar-coordinate description of impeller blades or stationary vanes, θ becomes
the construction angle and is usually regarded as positive in the direction of the blade
development from inlet to exit of the impeller or other blade row.



 

© 2007 McGraw-Hill Companies, Inc. (The)
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Peristaltic pumps use rotating rollers pressed against special flexible tubing to create a pressurized flow.
Double diaphragm pumps are positive displacement pumps that compress fluid by decreasing the volume of a chamber containing the fluid.
Rotary vane vacuum pumps and systems move media through the pump using a rotating assembly in the pumping chamber. Typically, there are two or more rotating vanes that move the media from inlet to outlet. Rotary vane vacuum pumps are positive displacement pumps.
Centrifugal pumps consist of a set of rotating vanes, enclosed within a housing or casing, that are used to impart energy to a fluid through centrifugal force.
Metering pumps are precision pumps, which dispense an exact amount of material. They are used in a variety of chemical dosing and metering applications.
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