Once you have established the flow rate and pressure, all you have to do is look at the graphs for each TECNOMA pump and choose the pump whose curve passes through or close to the point where your two values intersect.
Example : head 38 m, output 2 m3/h
The PULSAR 1300 pump curve goes though this point.
This calculation does not affect your choice of whether to use a manual start-stop, top-up, or automatic booster pump ; the type of pump is purely dependent on the use you make of it (automatic or not, domestic use, etc.).