Pump Type		Construction Style		Notes

Dynamic Type Pumps

Centrifugal	      Single stage overhung,        Capacity varies with head.
  (horizontal)		  process type

		      Two stage overhung    	    Used for heads above single-stage capability.

		      Single-stage impeller	    Used for high flows of 1083 ft (330 m) head.
			  between bearings

		      Chemical			    Have low pressure and temperature ratings.

		      Slurry			    Low speed and adjustable axial clearance.
						    Has erosion control features.

		      Canned			    Low head capacity limits when used in chemical
						    services.

		      Multistage, horizontal	    Have moderate temperature-pressure ranges.
			  split casing

		      Multistage, barrel type	    Used for high temperature-pressure ratings.

Centrifugal	      Single-stage, process         Used to exploit low net positive section head
  (vertical)	    	  type			    (NPSH) requirements.

		      Multistage		    Low-cost installation.

		      Inline			    Low cost installation.

		      High speed		    High head/low flow.  Moderate costs.

		      Sump			    Low cost.

		      Multistage, deep well	    Used for water well service.

Axial		      Propeller			    Vertical orientation.

Turbine		      Regenerative		    Capacity independent of head.  Low flow/high
							head performance.


Positive Displacement Pumps

Reciprocating	      Piston, plunger		    Driven by steam engine cylinders or motors
							through crackcases.

		      Metering			    Diaphram and packed plunger types.

		      Diaphram			    Used for chemical slurries.  Can be pneumatically
							or hydraulically actuated.

Rotary		      Screw		            For high-viscosity, high-flow-high-pressure
							services.

		      Gear			    For high-viscosity, moderate-pressure/moderate-flow
							services.

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