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PRESSURE DROP (PSIG)
WATER FLOW (GPM)
4.0
3.5
3.0
2.5
2.0
0 5 10 15 20 25 30 35 40 45 50
DEL AOP PRESSURE DROP CHARACTERIZATION
NOTE: Tested on simulated recirculation system using a Pentair lntelliflo variable speed pump. No back pressure added. Back
pressure will raise the inlet pressure (filter pressure) but reduce the pressure drop slightly. Actual results will vary depending
on pump and plumbing variables.
FIGURE 19: AOP 25 Pressure Drop Over a Range of Flows (With and Without Orifice Plate)
FIGURE 18: AOP 40 Pressure Drop Over a Range of Flows
APPENDIX B
PRESSURE DROP (PSIG)
WITH ORIFICE INSTALLED
(0.63” DIAMETER)
WITHOUT ORIFICE INSTALLED
WATER FLOW (GPM)
9
8
7
6
5
4
3
2
1
0
0 5 10 15 20 25 30 35 40 45
