5-5-12 - 4
When
∆
p and the design flow are known, use the formula to calculate the Cv-value or use the diagram.
Software
TA Select: Makes it easy to choose the right balancing valves by taking into account the desired flow, pressure drop and flow rate.
Measuring instruments
Use the TA-CBI electronic instrument. It is programmed with valve characteristics for TA valves, enabling measured differential
pressure to be read off directly as a flow rate. For further information on TA-CBI, see catalogue leaflet TA-CBI.
Conversion disc
By using the conversion disc it is easy to calculate the relationship between flow, pressure and setting values for all valve sizes.
Manuals
See the following manuals for descriptions of various balancing methods:
Total hydronic balancing
Manual no. 1: Balancing control circuits
Manual no. 2: Balancing distribution systems
Manual no. 3: Balancing radiator systems
Manual no. 4: Stabilising differential pressure
Sizing
Support material
Cv values
No of
Turns
1/2”N
3/4”
1”
1 1/4”
1 1/2”
2”
0.5
.147
.593
.70
1.32
2.03
2.97
1
.246
.878
1.19
2.20
3.83
4.87
1.5
.364
1.38
2.4
3.60
5.34
8.35
2
.662
2.20
4.20
5.40
7.08
13.6
2.5
1.02
3.24
6.15
8.24
10.2
18.8
3
1.60
4.49
8.00
11.0
14.6
24.9
3.5
2.30
5.51
9.28
13.7
18.6
30.7
4
2.92
6.61
10.1
16.5
22.3
38.3
Cv
Cv
1,52
q in GPM,
∆
p in Ft
q in GPM,
∆
p in psi
