Why should positive displacement feed pumps be operated at a range of 30-70%?

Operating positive displacement feed pumps within the range of 30-70% is crucial for achieving accuracy in stroking speed and length. At this operational range, the pump can maintain consistent performance, allowing for precise control over the amount of fluid being displaced. This accuracy is vital in applications where the exact volume of liquid is critical for maintaining process balance, ensuring optimal chemical dosing, or achieving desired flow rates.

When a pump operates within the ideal range, it can effectively manage the hydraulic conditions and avoid issues such as cavitation or excessive pressure, which can lead to inaccuracies in performance. Therefore, maintaining a stroking speed and length within this range directly contributes to the reliability and effectiveness of the pumping process, ensuring that it meets the necessary operational standards.