It consists of two meshed gears that rotate in a closely, fitted casing.
A drive gear (that is driven by a motor) rotates an idler gear in the opposite direction. When the gears rotate, the liquid, which is trapped in the gear teeth spaces between the housing bore and the outside of the gears, is transferred from the inlet side of the pump to the outlet side.
It is important to note that the pumped liquid moves around the gears and not between the gears. The rotating gears continue to deliver a fresh supply of liquid from the suction (inlet) side of the pump to the discharge (outlet) side of the pump.
for each revolution
by acting on the motor speed
especially at low rotation speed.
thanks to simple construction