There are 3 types of Drum Pumps: Manual Pumps, Safety Pumps and Power Pumps.
Manual pumps/Hand Pumps: Preset amounts they can pump per stroke. Manual Pumps are powered by the user with a rotary pump or transfer pump
Power Pumps: A specified rate of gallons per minute which they can pump that is dependent on the viscosity of the fluid being pumped and the power. Power pumps are available in electric or air operated pumps
Safety Pumps: Allow the safe transfer of flammable liquids.
Consider these when selecting a drum pump: