Putting together separation performance and hydraulic capacity, we can see the effect of flow rate (hydraulic capacity) turndown and performance. The flow rate (turndown) and performance are interlinked. A cyclone-based unit (desander) thus has a separation size that can be tuned to match changing condition.
We now discuss the turndown and performance for insert style (i.e. single cone design) desanders. This is for liquid only flow. The chart below plots flow rate (produced water) versus pressure drop. It also shows the separation size (D98) experienced through this range of flow rates. Data is presented for desander inserts from 4” (100mm) to 20” (500mm).