The gear pumps are designed primarily for metering and transfer applications. Their modular design allows a wide variation of flow ranges with a standard parts set. These pumps provide a broad class of industrial pumps in flow ranges of 10 ml. per minute to 1 gal. per minute. All of the gear pumps are self-priming and are “constant flow” pumps when RPM and differential pressure are constant. The materials of construction for bodies, gears and seals, provide a wide range of fluid compatibility.