.................................................................................................................................................................................................................. Centrifugal Pump Total Dynamic Head on Suction Lift
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Calculating Total Dynamic Head (TDH) on Suction Lift Applications

Total Dynamic Head Suction Lift

Suction Lift Application

100 GPM of Water at 170 F

Find the Total Dynamic Head (TDH)


TDH = Total Discharge Head + Total Suction Lift


Suction:


Total Suction Lift= Static + Friction


Suction Static Lift---------------------------------------- 15'


Friction Suction Side-See Friction Resistance Chart Here-->


Total Length of 3" Pipe----------------------35'


See Friction Resistance Fitting Chart Here-->


(1) 90 deg 3" Elbow = 7.7' of Pipe----------7.7'


Total Equivalent Length of 3" Pipe---------42.7'


Friction = 4.96 x 42.7 / 100------------- 2.1'


Total Suction Lift = 15'(Static) + 2.1'(Friction) = 17.1'


 


Discharge


Total Discharge Head = Static + Friction


Discharge Static Head--------------------------------------22'


Friction Discharge Side-See Friction Resistance Chart Here-->


Total Length of 2" Pipe------------------------142'


See Friction Resistance Fitting Chart Here-->


(4) 90 deg 2" Elbow = 20.8(4x5.2)of Pipe---20.8'


Total Equivalent Length of 2" Pipe ----------162.8'


Friction = 35.8 x 162.8/100-----------------58.3'


Total Discharge Head = 22'(Static) + 58.3'(Friction) = 80.3'


Total Dynamic Head = Total Discharge Head + Total Suction Head= 80.3' + 17.1' = 97.4'


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