MIL-HDBK-1005/7A
5.1.4.2
Multiple-Pump Installation . Use this arrangement
normally; determine the capacity of each pump from a detailed
study of various combinations to meet variations in demand.
Provide at least three pumps. The necessary station capacity
should be available with the largest pump out of service.
5.2
Selection and Installation of Pumps
5.2.1
Types and Applications . Refer to Pumping Manual, T.
C. Dickenson, 9th Edition, or Hydraulic Institute Standards for
information regarding proper application of pump types. Pump
characteristic tables are provided in the Pumping Manual.
5.2.2
Pump Selection . Seek catalog information and guidance
of several pump manufacturers in selecting a particular pump.
Refer to Table 10 for the factors involved.
Table 10
Factors in Pump Selection
ITEM
DETAILS AND FACTORS
Pump characteristics
Capacity range (gpm)
Discharge head range (feet)
Characteristic curve (steepness,
kinks)
Efficiency
Power input
Speed (rpm)
Specific speed
Suction requirements
Pump construction
Conform to standards of Hydraulic
Institute (HI)
Pump materials must be suitable
for liquids to be handled
Bearing and seal construction
Space requirements
Compare vertical with horizontal
type and select pump requiring
least space, other factors being
equal
Operating flexibility
Pump starting characteristics
Pump priming requirements
Behavior under parallel operation
Economy
Power
Maintenance
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