Technical Support

Properly applying pumps can be a complex business. In this section you'll find information that can help in understanding pump basics, fluid dynamics, and other relevant information that can help in the process.

Capacity

Capacity (Q) is normally expressed in gallons per minute (gpm). Since liquids are essentially incompressible, there is a direct relationship between the capacity in a pipe and the velocity of flow. This relationship is as follows:

Where
A = area of pipe or conduit in square feet.
V = velocity of flow in feet per second.
Q = Capacity in gallons per minute

NOTE: On vertical pumps the correction should be made to the eye of the suction or lowest impeller.

Content provided by Goulds Pumps Inc.