Page 56 - Apollo - 2016 Backflow Prevention Catalog

BACKFLOW PREVENTION CATALOG

Flow Curves

Flow Curves: Pressure loss versus flow data as determined by
independent approval agencies. (See Notes on page 71)
DOUBLE CHECK VALVES
DCLF 4A

7.5 7.5 7.5
FT/S FT/S FT/S
(2-1/2") (3") (4")
20 3"
15
DC4A PRESSURE LOSS (PSI) 10 2-1/2" 4"
5
DCDA 4A 0 FLOWRATE (GPM) 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800
00
50
DCDA2 4A

7.5 7.5
FT/S FT/S
(6") (8")
20
PRESSURE LOSS (PSI) 10 6" 8"
15
5
0
0 0 200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
FLOWRATE (GPM)

7.5 7.5
FT/S FT/S
(10") (12")
20
PRESSURE LOSS (PSI) 10 10" 12"
15

5
0
00 400 800 1200 1400 1800 2200 2600 3000 3400 3800 4200 4600
FLOWRATE (GPM)

Meter Rated Flow
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