4900 Series Pump Manual

The 4900 Series gear pump is a positive displacement, rotary pump with two gears of equal size. The pump has a constant discharge at constant rotational speed. The inlet port of the pump is on the side where the gears are coming out of mesh. The discharge port is on the side of the pump where the gears are coming in to mesh. The pump transfers fluid trapped in the spaces between adjacent gear teeth and the cylinder from the inlet to the discharge side of the pump.