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Duo-ChekValves
0.1
10
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7000
10000
20000
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50000
60000
70000
100000
200000
300000
400000
500000
600000
700000
1000000
0.2
0.3
0.5
0.6
0.7
1.0
0.6
1.3
1.9
2.5
3.2
3.8
4.4
6
13
19
25
32
38
44
63
126
189
252
315
378
442
631
1262
1892
2523
3154
3785
4416
6308
12616
18924
25232
31540
37848
44156
63080
0.4
2.0
3.0
4.0
5.0
6.0
7.0
10
20
30
40
50
60
70
100
0.03
0.06
0.09
HEAD LOSS INMETERSOFWATER
GALLONSPERMINUTE
LITERSPERSECOND
HEAD LOSS IN FEETOFWATER
0.12
0.15
0.18
0.21
0.3
0.6
0.9
1.2
1.5
1.8
2.1
3.0
6.1
9.1
12.2
15.2
18.3
21.3
30.5
2" VALVE
3"
2 1/2"
5"
6"
8"
10"
12"
14"
16"
18"
20"
24"
30"
36"
42"
48"
54"
60"
66"
72"
LOSSESSHOWNBASESONWATERAT 60°FWITHSP. GR. OF 1.0
4"
Technical Data
PressureLoss Information
• The curves showpressure drops availablewith standard torque springs
and theDuo-Chek in horizontal flow.
• Duo-Chek valves should be installed in horizontal flowwithpins vertical
for best performance.For other installations, contact the factory.
• Eachpiping system has aunique geometrywhich should be evaluated
whenever the liquidmedia velocity exceeds 8 feet/second (2.4m/sec)
througha swageor expansion (15° or greater includedangle) directly
upstream of the valve.Wherepracticable,
formaximumservice life,
andbasedonactual service,
aminimum of one (1) to five (5) pipe
diameters distance should bemaintainedbetween the valve and the
pump discharge and pipe fittings (swages or expansion).
• Systemswith drastic flow decelerationsmay require higher torque
springs for faster valve response and to reducewater hammer.Please
consult the factory.
• We can evaluateDuo-Chek valves relative to your system behavior.
