A small vane called the intra-vane is used in conjunction with external holes to control what aspect of the pump?

The intra-vane is specifically designed to manage vane tip loading and wear within a pump system. It functions by allowing for adjustments that can optimize the performance of the pump by minimizing stress and wear on the vanes. When the intra-vane operates in conjunction with external holes, it helps maintain an even distribution of load across the vanes, which is crucial for extending the lifespan of the pump components.

While the intra-vane may indirectly influence pump volume and pressure under specific conditions, its primary and most direct function is related to the loading and wear of the vanes. Therefore, focusing on how it controls vane tip loading and wear provides a clear understanding of its critical role in pump operation. This distinction underscores the importance of the intra-vane in managing the mechanical integrity of the pump, with an emphasis on performance and durability.