What type of pumping system is characterized by continuous flow and positive displacement?

A pumping system that is characterized by continuous flow and positive displacement typically involves a mechanism that moves fluids by trapping a fixed amount of liquid and forcing it into the discharge pipe. This description fits the reciprocating pump well, as it utilizes a back-and-forth motion to move fluid, providing a consistent and controlled flow rate.

Reciprocating pumps operate with various mechanisms such as pistons or diaphragms that displace a specific volume of liquid with each stroke. This design ensures that the flow rate remains steady and can be precisely adjusted, making reciprocating pumps ideal for applications requiring reliable and constant pressure.

The other types of pumps listed, including submersible and centrifugal, do not primarily operate on the principle of positive displacement in the same manner. Centrifugal pumps, for instance, rely on rotational energy to create flow and are not positive displacement devices; they tend to regulate flow based on system pressure rather than moving a defined volume per cycle. Gear pumps also operate using the positive displacement principle, but the broad characteristics presented in the question align closer with the reciprocating pump.