| Percent of Flow
Area Sure Flow
Check vs Standard Steel Pipe
|
| Size |
Pressure Class |
150 |
300 |
600 |
900 |
1500 |
2500 |
2" |
36.7 |
36.7 |
44.0 |
54.4 |
54.4 |
36.1 |
3" |
39.1 |
39.1 |
43.8 |
46.6 |
46.6 |
32.8 |
4" |
41.4 |
41.4 |
45.8 |
47.7 |
47.7 |
29.5 |
6" |
54.0 |
54.0 |
58.5 |
52.9 |
52.9 |
33.4 |
8" |
56.7 |
56.7 |
57.8 |
58.6 |
58.6 |
32.7 |
10" |
56.0 |
56.0 |
67.9 |
70.5 |
52.6 |
30.9 |
12" |
61.8 |
61.8 |
63.0 |
71.8 |
62.0 |
31.2 |
14" |
66.7 |
72.5 |
62.9 |
75.4 |
75.4 |
- |
16" |
64.3 |
55.2 |
67.9 |
71.8 |
71.8 |
- |
18" |
74.5 |
69.9 |
64.8 |
76.4 |
74.0 |
- |
20" |
70.8 |
65.1 |
67.4 |
84.0 |
81.0 |
- |
24" |
66.0 |
63.4 |
68.3 |
71.4 |
71.0 |
- |
|
| Approximate
performance data for Sure Flow Check valves when used with water
at 60° F with a nominal 10 ft/sec velocity
|
Valve Size |
Flow (imperial gals/min) |
Pressure drop psi |
Head loss in feet |
Approx. equiv. length
of pipe
in feet |
2" |
86 |
4.49 |
10.32 |
30 |
3" |
192 |
2.97 |
6.83 |
34 |
4" |
368 |
2.30 |
5.29 |
35 |
6" |
750 |
1.47 |
3.38 |
37 |
8" |
1292 |
1.20 |
2.76 |
40 |
10" |
2116 |
0.93 |
2.14 |
41 |
12" |
2920 |
0.81 |
1.87 |
44 |
14" |
3570 |
0.74 |
1.70 |
45 |
16" |
4750 |
0.60 |
1.38 |
47 |
18" |
6600 |
0.55 |
1.27 |
47 |
20" |
7500 |
0.51 |
1.18 |
50 |
24" |
12500 |
0.42 |
0.97 |
52 |
|
