Normal	
									    number						    Solids
Pump Type		Construction Style		of stages		Maintenance		tolerance

Dynamic Type Pumps

Centrifugal	      Single stage overhung,		1		    L			M-H 
  (horizontal)		  process type

		      Two stage overhung		2		    L			M-H

		      Single-stage impeller		1		    L			M-H
			  between bearings

		      Chemical				1		    M			M-H

		      Slurry				1		    H			 H

		      Canned				1		   L-M			 L

		      Multistage, horizontal	      Multi		    L			 M
			  split casing

		      Multistage, barrel type	      Multi		    L			 M

Centrifugal	      Single-stage, process		1		    L			 M
  (vertical)	    	  type

		      Multistage			1		    L			 M

		      Inline				1		    L			 M

		      High speed			1		    M			 L

		      Sump				1		    L			M-H

		      Multistage, deep well	      Multi		   M-H			 M

Axial		      Propeller				1		    L			 H

Turbine		      Regenerative		       1,2		    H 			 M


Positive Displacement Pumps

Reciprocating	      Piston, plunger			1		    H			 M

		      Metering				1		   M-H			 L

		      Diaphram				1		    H			 L

Rotary		      Screw				1		    M			 M

		      Gear				1		    M			 M

Pumps and Pumping Operations, Nicholas P. Cheremisinoff & Paul N. Cherenisinoff - Prentice Hall, 1993.