Which of the following components is NOT part of a pneumatic system?

In a pneumatic system, the primary components typically include lines (pipelines for air), valves (to control the flow of air), and actuators (mechanical devices that convert the energy from compressed air into motion). While a pump may be involved in other systems, such as hydraulic systems or certain processes where air is compressed, it does not constitute a fundamental part of a pneumatic system. Pneumatic systems primarily rely on a compressor instead of a pump to provide the necessary compressed air required for operation.

In summary, the pump is not considered a standard component of a pneumatic system, which is generally concerned with using pressurized air to perform work rather than relying on pumps to move fluids.