Pump selection parameters

The process involved in the selection of a suitable pump for a given application depends on many parameters, some of which were summarised in section 2. As a consequence a generalisation is not possible but some major features can be identified as shown in Table

Gear pump (Fixed displacement External type Internal type Other features
  Low cost
Low contaminant sensitivity
Compact, low weight
Good suction performance
250cm³/rev, 250bar
 Low noise
Low contaminant sensitivity
250cm³/rev, 250bar
 In-line assembly for multi-pump units
Vane Fixed displacement Variabale displacement  
  Low noise
Good serviceability
200cm³/rev, 280bar
 Low noise
Low cost
Good serviceability
Displacement controls
100cm³/rev, 160bar
 In-line assembly for multi-pump units
Piston Fixed and variable displacement  
  High efficiency
Good serviceability
Wide range of displacement controls
Up to 1000 cm³/rev., 350/400bar
 Integral boost pump and multipump assemblies (not bent axis0
Can use most types in hydrostatic transmissions 
 

Gear pumps