User Guide

Technical Instructions Powermite 599 MT Series Terminal Unit 2-way Valves
Document Number 155-196P25
May 20, 2008
Page 6 Siemens Building Technologies, Inc.
Differential Pressure p (psi)
Flow Rate
(
GPM
)
Flow Rate (m3/hr)
Differential Pressure p (kPa)
1"
(
25
)
Cv = 10
3/4"
(
20
)
Cv = 6.3
1/2"
(
15
)
Cv = 4.0
1/2"
(
15
)
Cv = 2.5
1/2"
(
15
)
Cv = 1.6
1/2"
(
15
)
Cv = 1.0
1/2"
(
15
)
Cv = 0.63
1/2"
(
15
)
Cv = 0.4
8 9 10 20 30 40 50 60 70 80 90 100 200 300 400
100
1 2 3 4 5 6 7 8 9
10 20 30 40 50 60
70
0.5
0.4
0.3
0.2
0.1
0.6
0.8
11
2
3
4
5
6
8
10
20
30
40
50
60
80
100
200
300
1
10
2
1
0.8
0.6
0.5
0.4
0.3
0.2
0.1
0.08
0.06
0.05
0.04
0.03
3
4
5
6
8
20
30
40
50
10
VF0320R1
Figure 1. Water Capacity Graph.
Selection Example
See Figure 1.
Select a valve given:
c Required flow = 20 gpm.
d Desired pressure drop = 5 psi.
e Choose a 1-inch (25-mm) valve, Cv 10.