The 200QJ20-405/30 is a 45kW deep well submersible pump for groundwater supply projects, offered with cast stainless steel hydraulic components. Its nominal flow is 20 m³/h and its nominal head is 405 m. The catalog lists a flow range of 18–22 m³/h, a head range of 345–465 m and a 2.5 inch outlet. Operating point: The nominal flow and head identify the model's stated duty designation. We confirm the required operating point against the performance curve for the quoted