What type of pump is characterized by having an eccentric rotor?

The type of pump characterized by having an eccentric rotor is the flexible liner pump. This design utilizes a rotor that is positioned off-center, which enables the pump to create a positive displacement as it rotates. The eccentricity of the rotor causes the flexible liner to deform as fluid flows through the pump, effectively trapping and moving liquid through the discharge port. This mechanism is efficient for handling a variety of fluids, especially those that are viscous.

In contrast, other pump types do not feature the same eccentric rotor design. For example, a flexible tube pump typically uses a tube that is compressed to create flow, while an internal gear pump relies on the meshing of gears to move the fluid. An external vane pump uses vanes that slide in and out of slots on a rotor to create flow, which is fundamentally different from how a flexible liner pump operates. This unique characteristic of the flexible liner pump makes it suitable for specific industrial applications, particularly where fluid shear must be minimized.