Sun-pumps MTR BLM-SB-103S-120Y User Manual download pdf (Page 6)

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.)

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Sun-pumps MTR BLM-SB-103S-120Y User Manual Page 6