QED AutoPump AP-2, Operation Manual

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QED Environmental Systems
AP-2 Manual
Page 60
These curves were derived from in-house tests using a pump with average air flow capacity.
Flow rates in the field may vary slightly due to temperature, air quality, flow restrictions and
minor differences in pump adjustments. Flow rates can be affected due to the natural cooling
effect of compressed air expansion. If this cooling effect is lowering the flow rate, decreasing
the air pressure to the pump can actually increase the flow rate in some cases. Another way
to reduce freezing of water vapor in compressed air is to use an air dryer on the compressed
air line.
The following charts show the performance flow rate curves for the Long and Short pumps.
Long Bottom and Top-Loading AP-2 AutoPumps
• See Figures 20 and 21.
Short Bottom and Top-Loading AP-2 AutoPumps
• See Figures 22 and 23.
The curves are categorized by pump type, hose size, depth of submergence and air supply
pressure. To determine the flow rate a pump will produce, the following information must
be known:
1. Pump – Long, Short or Low Dardown; Top- or Bottom-Loading.
2. Discharge hose size – 1/2 inch is standard. A larger inside diameter may yield a higher flow
rate. This depends on site conditions.
3. Fluid Inlet Submergence – Select the submergence depth of the pump below the fluid
under normal operating conditions.
4. Air pressure .
Appendix A: Performance Curves