User Guide

599 Zone Valve Series: Two-Way and Three-Way Technical Instructions
Document No. 155-320P25
February 6, 2006
Siemens Industry, Inc. Page 3
Table 2. Maximum Water Capacity - U.S. Gallons per Minute.
Valve
Size
inches
Pressure Differential - psi
Cv\1 2 3 4 5 6 8 10 15 20 25 30 40 50 60 75
0.5 1.0 1.4 1.7 2.0 2.2 2.4 2.8 3.2 3.9 4.4 5.0 5.5 6.3 4.1 7.7 8.7
0.5 2.5 3.5 4.3 5.0 5.6 6.1 7.1 7.9 9.7 11.2 12.5 13.7 15.8 17.7 19.4 21.7
0.5/0.75 4.1 5.8 7.1 8.2 9.2 10.0 11.6 13.0 15.9 18.3 20.5 22.5 25.9 29.0 31.8 35.5
1.00 7.0 9.9 12.1 14.0 15.7 17.1 19.8 22.1 27.1 31.3 35.0 38.3 44.3 49.5 54.2 60.6
Table 3. Maximum Water Capacity - Cubic Meters per Hour (m
3
/hr).
Valve
Size
mm
Pressure Differential - kPa
1 10 20 30 40 50 60 80 Kvs/ 100 150 200 300 400 500
15 0.9 0.27 0.38 0.47 0.54 0.60 0.66 0.76 0.85 1.04 1.20 1.47 1.70 1.90
15 0.21 0.68 0.96 1.17 1.35 1.51 1.66 1.91 2.15 2.60 3.00 3.70 4.30 4.80
15/20 0.35 1.12 1.59 1.94 2.24 2.51 2.75 3.17 3.50 4.34 5.01 6.14 7.09 7.93
25 0.60 1.91 2.71 3.32 3.83 4.28 4.69 5.41 6.00 7.41 8.56 10.48 12.11 13.54
Figure 2. Water Capacity Graph.
Selection Example
See Figure 2.
Select a valve given:
 Required flow = 6 gpm
 Desired pressure drop = 6 psi
 Choose a 1/2-inch (15-mm) valve, Cv 2.5