Like what you see? Ask us for a full-length preview and pricing options for our entire course catalog
Request full preview
One of the most common types of positive displacement pumps is the gear pump. A gear pump uses the pockets created by a pair of turning gears to transfer and pump fluid. At the inlet side of the pump, fluid flows into the area where turning gears separate from each other. As the gears rotate and meet the casing of the pump, fluid is trapped in the space between the teeth and the case. Fluid travels around the interior of the casing. Because the meshing of the gears creates a seal and prevents fluid from returning to the inlet, it is forced under pressure through the outlet port.