What type of power units are commonly used for small pumps on tankers or tenders?

Power take-off units are commonly used for small pumps on tankers or tenders due to their ability to transfer power directly from a vehicle’s engine to the pump without needing a separate power source. This integration allows for efficient operation, as the pump can be activated by the vehicle's own engine power, streamlining the workflow during emergency situations or refueling operations.

Using power take-off systems allows for a compact installation, preserving space and enhancing reliability since there are fewer components involved compared to standalone engines or electric motors. This method is particularly advantageous in vehicles where space is limited, and versatility is needed, such as with fire apparatus that require quick deployment of water or other materials.

While gasoline engines, diesel engines, and electric motors can be used to power pumps, they typically require separate installations or modifications to the vehicle, which can complicate maintenance and operation in a dynamic environment such as firefighting. Power take-off systems are specifically designed for these applications, making them the preferred choice for small pumps on tankers or tenders.