QED AutoPump AP-2, Operation Manual

Page: 74 / 111

QED Environmental Systems
AP-2 Manual
Page 66
The following charts show the air consumption curves for the Long and Short length AP-2
AutoPumps. These curves can be used to estimate air use and compressor sizing. A
compressor with reserve capacity is recommended.
The following charts show the air consumption curves for the Long and Short pumps.
Long Bottom and Top-Loading AP-2 AutoPumps
• See Figures 24 and 25
Short Bottom and Top-Loading AP-2 AutoPumps
• See Figures 26 and 27.
The curves are categorized by pump length, hose size, depth of submergence and air supply
pressure. To determine the amount of air used for each gallon of fluid pumped, the following
information must be known:
1. Pump – Long or Short.
2. Discharge hose size – 1/2-inch I.D. A larger diameter may yield significantly lower air use
rates, depending upon site conditions.
3. Air pressure .
With the above information, obtain the probable flow rate by using the following steps:
• On the horizontal scale, find the depth in the well at which the pump will be located.
• Trace that depth upwards to the line for the air inlet pressure you selected.
• Travel horizontally over to the vertical scale and read the air use factor.
Example : A long Bottom-Loading pump with a 1/2-inch discharge hose and 70 psi supply
pressure positioned 50 feet below ground will use about 0.60 SCF of air for each gallon of
fluid pumped.
The maximum flow rate for the pump, taken from the flow rate curves, when there is 10 feet of
fluid over the pump and it is positioned 50 feet below ground is about 1.5 GPM.
Multiply the 1.50 GPM flow rate times the 0.60 SCF air use factor to generate a .90 SCFM
(Standard Cubic Feet per Minute) air use result.
Appendix B: Air Consumption Curves