Maximum water flow from an
airlift pump |
Limitations of calculation (outwith
these parameters the calculations will become less accurate): |
|
Pipe diameter 1.5 - 8cm |
|
Pipe length 60 - 300 cm |
|
Q = ((0.758 x (%s)1.5
x ht0.33) + 0.01196) x d2.2 |
Where ; |
Q |
= |
Water flow rate, litres per minute |
ht |
= |
Total length of pipe (cm) |
d |
= |
diameter of pipe (cm) |
%s |
= |
Percent of pipe under water (measured from
point of diffuser to discharge) |
Air requirements for optimal
water flow are typically 8-9% of the water volume. Above 10%, normal
bubble flow ceases and the efficiency of the airlift drops rapidly |