CONSTANT DISPLACEMENT PUMP

A constant-displacement pump forces a fixed quantity of fluid through the outlet port during each revolution of the pump.

Constant-displacement pumps are sometimes called constant-volume or constant-delivery pumps.

They deliver a fixed quantity of fluid per revolution, regardless of the pressure demands. Since the constant-delivery pump provides a fixed quantity of fluid during each revolution of the pump, the quantity of fluid delivered per minute depends upon pump rotations per minute.

When a constant displacement pump is used in a hydraulic system in which the pressure must be kept at a constant value, a pressure regulator is required.

Some various types of Constant Displacement Pumps are:

1. Gear type pump

2. Geroter type pump

3. Inline piston pump

4. Vane pump