Sun Pumps MTR BLM-SB-073S-60 - Manual (Page 7)

Figure 1 Solar Pump System Terms & Head Calculations
Draw
Down
Static Water Level
Vertical
Lift
Pump Level
Pump Setting
SCS Submersible Pump
Pumping Level _____________ Feet
Vertical Lift _____________ Feet
Friction Loss _____________ Feet
Total Dyn. Head _____________ Feet
Total Dynamic Head = PL + VL + FL
Water Tank
Submersible Pump Cable
Sanitary Well Seal
Drop Pipe
+
+
=
(See Friction Loss Chart)
Determining Total Dynamic Head
Pumping Level
Pumping level is the vertical distance in feet from the discharge pipe at the well head to the water level
in the well while pumping at the specified flow rate.
Vertical Lift
Vertical lift is the vertical distance in feet from the discharge pipe at the well head to the discharge pipe
at the top of the water tank.
Friction Loss
Friction loss is the resistance to flow through a pipeline measured in PSI drop and converted to head
feet. The amount of loss depends on the diameter of the pipeline, the length of the pipeline, the flow rate,
the number and type of fittings and the coefficient of friction of the pipeline material. Refer to friction
loss tables for your specific application. (There is a Friction Loss Program on the SunPumps web site in
the engineering section at www.sunpumps.com.)