Internal gear pump

Internal gear pumps are exceptionally versatile.  While they are often used on thin liquids such as solvents and fuel oil, they excel at efficiently pumping thick liquids such as asphalt, chocolate, and adhesives.  The useful viscosity range of an internal gear pump is from 1cPs to over 1,000,000cP.

In addition to their wide viscosity range, the pump has a wide temperature range as well, handling liquids up to 750F / 400C.  This is due to the single point of end clearance (the distance between the ends of the rotor gear teeth and the head of the pump).  This clearance is adjustable to accommodate high temperature, maximize efficiency for handling high viscosity liquids, and to accommodate for wear.

The internal gear pump is non-pulsing, self-priming, and can run dry for short periods.  They're also bi-rotational, meaning that the same pump can be used to load and unload vessels.  Because internal gear pumps have only two moving parts, they are reliable, simple to operate, and easy to maintain.