What function does the strainer serve in a pump system?

The primary function of a strainer in a pump system is to filter out debris. This is crucial because any impurities or foreign materials in the fluid can lead to damage or reduced efficiency of the pump and other components within the system. When a strainer is properly utilized, it helps maintain the cleanliness of the fluid, ensuring that only the desired liquid passes through the system. This prevents potential clogs and wear, ultimately extending the life of the equipment and improving overall reliability.

In contrast, the other options do not accurately describe the role of a strainer. Cooling steam or enhancing heating efficiency pertains to thermal systems rather than filtering. Additionally, while a strainer may indirectly influence flow dynamics by keeping the system clean, its main and essential function is debris filtration rather than directly increasing water flow.