Geotech 0.675, Installation And Operation Manual

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12
Determining PSI
Determine the air pressure needed to operate the Bladder Pump based on the length of
the air supply line to the pump (well depth). Use the simplified formula:
0.5 PSI (per foot) + 10 PSI (to account for tubing friction) = required PSI
0.12 bar (per meter) + 0.7 bar (to account for tubing friction) = required bar
As mentioned above, the additional 10 PSI/ 0.7 bar is to account for the pump itself and
friction loss along the airline tubing. When the length of the airl
ine is 50’ (15m) or less,
there is no need for the additional pressure.
To determine minimum operating pressures for the specific Bladder Pump model you are
using, consult the pump’s specifications. Typically, the minimum operating pressure will be
5 PSI/ 0.4 bar above static head.
The formulas stated above are not absolute, and are meant to
provide baseline information.