GB.TBXZ342.130915
Registered design. The company reserves the right to make changes without prior notice.
10 www.swegon.com
Important!
If the flow is outside the chart, it can be read as follows:
Assume the example above that reads 25 kPa, Kv=53 and
a flow of 27 m
3
/h. For 25 kPa and Kv=5,3 you read a flow
of 2,7 m
3
/h and for Kv=53 you read 270 m
3
/h. Therefore,
for every given pressure drop you can read 0.1 or 10 times
the flow and Kv.
Example
This chart shows the pressure drop across the valve. A
straight line that interconnects the scales for flow – Kv
- pressure drop constitute the relationship between the
different readings.
The position for each valve size can be obtained by plot-
ting a horizontal line from the value intersected on the Kv
scale.
Sought
Presetting for DN 65 and required 27 m flow
3
/h and pres-
sure drop of 25 kPa.
Solution
Plot a line between 27 m
3
/h and 25 kPa. This intersects the
Kv scale at KV=53. Then plot a horizontal line from Kv 53
to the DN 65 scale where you read 4,5 turns.
7.2 DN 65 (GOLD SD 100/120, GOLD CX 100/120)
