What is a Gear Pump?
A “Spur Gear” or “External Gear” pump has two interconnected gears that rotate within a figure-eight shaped cavity. Fluid is trapped between the gear teeth and the cavity wall, and is transported along the inner walls of the pump cavity. Why Gear Pumps? • Gear pumps are an ideal choice for viscous products. • Gear pumps lose performance gradually, and generally won’t fail catastrophically. • Since they are positive displacement, the flow rate degradation is directly proportional to TDH. • Gear pumps don’t shear fluid as much as other pump technologies. • Gear pumps are essentially pulseless positive displacement pumps. This makes them ideal for pulse sensitive applications or where you need to install a flowmeter near the pump output. Why Oberdorfer Centrifugal Pumps? • Quiet operation, longer gear life, and less product shear from helical gears • Longer bearing life from slotted bearing surfaces which balances axial load • Reduced NPSHr, and greater installation flexibility from large
