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Table Of Contents
The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2014 Johnson Controls, Inc.
www.johnsoncontrols.com
V–346
Code No. LIT-1900036
Sizing Water Valves
Two-Position Applications: The valve is normally sized to the pipe size with the largest Cv.
Modulating Applications: The valve should be sized to produce the required gallons per minute (gpm) flow at a pressure drop of one to two
times the pressure drop across the coil at design flow.
Example: To select a VG1000 Series Ball Valve for a coil that requires 14 gpm at 5 psi pressure drop. The valve should be selected to
provide 14 gpm with a pressure drop across the valve between 5 and 10 psi (one to two times the pressure drop across the coil at the required
flow).
Solution: From the VG1000 Series Ball Valves
table that follows, a 1/2 in., 4.7 Cv valve provides 14.1 gpm flow at a pressure drop across the
valve of 9 psi. This is the valve to be selected, as the valve provides the needed flow with a pressure drop between one and two times the pressure
drop across the coil at the required flow.
Flow Rates in gpm
VG1000 Series Ball Valves
Cv 1.2 1.9 2.9 4.7 7.4 11.7 18.7 29.2 46.8 73.7
Pressure
Drop, psi
Flow Rate, gpm
1 1.2 1.9 2.9 4.7 7.4 11.7 18.7 29.2 46.8 73.7
2 1.7 2.7 4.1 6.6 10.5 16.5 26.4 41.3 66.2 104.2
3 2.1 3.3 5.0 8.1 12.8 20.3 32.4 50.6 81.1 127.7
4 2.4 3.8 5.8 9.4 14.8 23.4 37.4 58.4 93.6 147.4
5 2.7 4.2 6.5 10.5 16.5 26.2 41.8 65.3 104.6 164.8
6 2.9 4.7 7.1 11.5 18.1 28.7 45.8 71.5 114.6 180.5
7 3.2 5.0 7.7 12.4 19.6 31.0 49.5 77.3 123.8 195.0
8 3.4 5.4 8.2 13.3 20.9 33.1 52.9 82.6 132.4 208.5
9 3.6 5.7 8.7 14.1 22.2 35.1 56.1 87.6 140.4 221.1
10 3.8 6.0 9.2 14.9 23.4 37.0 59.1 92.3 148.0 233.1
11 4.0 6.3 9.6 15.6 24.5 38.8 62.0 96.8 155.2 244.4
12 4.2 6.6 10.0 16.3 25.6 40.5 64.8 101.2 162.1 255.3
13 4.3 6.9 10.5 16.9 26.7 42.2 67.4 105.3 168.7 265.7
14 4.5 7.1 10.9 17.6 27.7 43.8 70.0 109.3 175.1 275.8
15 4.6 7.4 11.2 18.2 28.7 45.3 72.4 113.1 181.3 285.4
16 4.8 7.6 11.6 18.8 29.6 46.8 74.8 116.8 187.2 294.8
17 4.9 7.8 12.0 19.4 30.5 48.2 77.1 120.4 193.0 303.9
18 5.1 8.1 12.3 19.9 31.4 49.6 79.3 123.9 198.6 312.7
19 5.2 8.3 12.6 20.5 32.3 51.0 81.5 127.3 204.0 321.3
20 5.4 8.5 13.0 21.0 33.1 52.3 83.6 130.6 209.3 329.6
21 5.5 8.7 13.3 21.5 33.9 53.6 85.7 133.8 214.5 337.7
22 5.6 8.9 13.6 22.0 34.7 54.9 87.7 137.0 219.5 345.7
23 5.8 9.1 13.9 22.5 35.5 56.1 89.7 140.0 224.4 353.5
24 5.9 9.3 14.2 23.0 36.3 57.3 91.6 143.1 229.3 361.1
25 6.0 9.5 14.5 23.5 37.0 58.5 93.5 146.0 234.0 368.5
26 6.1 9.7 14.8 24.0 37.7 59.7 95.4 148.9 238.6 375.8
27 6.2 9.9 15.1 24.4 38.5 60.8 97.2 151.7 243.2 383.0
28 6.3 10.1 15.3 24.9 39.2 61.9 99.0 154.5 247.6 390.0
29 6.5 10.2 15.6 25.3 39.9 63.0 100.7 157.2 252.0 396.9
30 6.6 10.4 15.9 25.7 40.5 64.1 102.4 159.9 256.3 403.7
Valve Sizing and Cross-Reference
Zone and Fan Coil Valves
Valve Sizing and
Cross-Reference