Centrifugal pump systems are for use with light oils and water-soluble mixtures up to 500 SSU. They will handle fluids containing abrasives or scale. For complete information, see FM60 Series centrifugal pumps.
Gear pump systems are for use with heavier lubricants (up to 500 SSU) which are free of abrasives or scale. For complete pump information, see SG2 and SG4 Series gear pumps.