|The teeth on Gear Pumps can be spur
(straight), helical (slanted), herringbone, etc.
There can be two, or more teeth on each
gear -- twenty is not uncommon.
The diameter of the gears and their
thickness varies widely.
The many variations have different effects
on the efficiency, strength, smoothness and other areas
This pump will pump in the reverse
direction if you reverse the direction of rotation of the gears.
Two pairs of valves can be added to make
this a Reversing Gear Pump, which pumps in the same
direction regardless of which direction the gears rotate.