What role does the rotating bowl play in the Delaval purifier?

The rotating bowl in a Delaval purifier is essential for the separation of contaminants. As the bowl rotates at high speeds, the centrifugal force generated causes denser particles, such as contaminants, to move outward to the bowl's walls. This process effectively separates these impurities from the lighter liquid, allowing for cleaner oil or liquid to be collected at the center. The design is specifically intended to maximize the efficiency of this separation process, making the rotating bowl a critical component in ensuring high-quality output in purification applications.

While the other choices suggest various functions that may be relevant in different contexts, they do not directly describe the primary role of the rotating bowl in this specific purifier system.