Environmental Engineering Reference
In-Depth Information
3.2.3.1 Static Suction Head
Static suction head refers to when the supply is located above the
pump datum:
Static Suction Head (ft) = Supply Level (ft) - Pump Level (ft)
(3.5)
3.2.3.2 Static Suction Lift
Static suction lift refers to when the supply is located below the
pump datum.
Static Suction Lift (ft) = Pump Level (ft) - Supply Level (ft)
(3.6)
3.2.3.3 Static Discharge Head
Static Discharge Head (ft) = Discharge Level (ft) - Pump Datum (ft)
(3.7)
If the total static head is to be determined after calculating the static
suction head or lift and static discharge head individually, two different
calculations can be used, depending on suction head or suction lift.
for suction head:
Total Static Head (ft) = Static Discharge Head (ft) - Static Suction Lift (ft)
(3.8)
for suction lift:
Total Static Head (ft) = Static Discharge Head (ft) + Static Suction Lift (ft)
(3.9)
Example 3.4
Problem:
Refer to Figure 3.2 to determine total static head.
Solution:
Static Suction Lift (ft) = Pump Level (ft) - Supply Level (ft)
Static Suction Lift = 128 ft - 121 ft = 7 ft
145 ft
Pump
128 ft
121 ft
figure 3.2 For Example 3.4.
