Well flow (well Q): 55 m³ / hour
Well diameter (well D): 10”
Well depth (L): 200 meters
Static Level (Ss): 40 meters
Dynamic level (Ds): 110 meters
Conduit diameter: 3”
Conduit total length (a+b+c+d): 250 meters
Store geometric height (h1): 65 meters
Valve: one (1)Bend: four (4)
Check valve: one (1) 
The above data for a well motopomp selection should be made as follows:

     1.Pump Diameter

• It should be (D Pump < D Wells). 8" diameter pump is best suited for this well in the diameter of 6", 8", 10" and 12" pumps.

     2. Pump Type

• It should be (Q Pump < Q Wells). Q well = 55 m3/hour so the most appropriate 8” pump type for this flow rate:

     3.Number of Stages

• It should be (Hm pumps> Hm plant).

Hm plant = Ds + h1 + Hs + (V² / 2g)Ds = 110 metersh1 = 65 metersHs = Pipe Friction Loss + Valve Loss + Angle Loss + Check Valve Loss= (2,5 x 11,18) + (1 x 6) + (4 x 1,6) + (1 x 6) = 46,35 mss V² / 2 g = ( 2.635)² / ( 2 x 9,81 ) = 0,35 metersShould be Hm plant = 110 + 65 + 46,35 + 0,35 = 221,7 meters; Hm pump  > 221,7 mss

     4.Motopomp Model SelectionIn SDP 8412 type pumps providing this manometric height is:SDP 8412/14 - 75 HP Motopomp.