What is the required distance between the bottom of the strainer and the bottom of the wet pit for a vertical shaft turbine pump?

For a vertical shaft turbine pump, maintaining an appropriate distance between the bottom of the strainer and the bottom of the wet pit is crucial for efficient operation and preventing damage to the pump. The recommended distance being one half of the pump bowl diameter is important for several reasons.

This distance ensures that there is enough water available for the pump to achieve proper operation without running dry, which could lead to cavitation, overheating, or damage to the impellers. The strainer's placement is also designed to prevent debris from entering the pump, ensuring that the water being drawn is clean, thereby reducing maintenance issues and ensuring the longevity of the pump.

Establishing this specific proportional distance helps accommodate variations in water levels due to factors like dry spells or variable inflow rates, which can affect the pump's performance. Additionally, the half-diameter requirement allows for the effective passage of water while minimizing the risk of air entrainment that can occur if the strainer is located too close to the bottom of the wet pit.

By adhering to this guideline, operators can ensure that their vertical shaft turbine pumps function reliably and efficiently, resulting in improved system performance.