8
∆
p
1
4
6
Setting
DN 15-50
. Unscrew the fixing screw (4) - Allen key 2 mm - on setting
wheel ().
2. Turn the setting wheel clockwise to increase the differential
pressure and vice versa.
3. On the setting wheel there is a mark which shows how
much
D
p changes at one turn of the setting wheel.
4. The pressures can be controlled through pressure gauges
on the pipeline.
5. After required differential pressure
D
p is reached, tighten
the fixing screw on the setting wheel.
6. It is also possible to secure the setting with the leaden seal
- use holes on the body (8) and the setting wheel (9).
DN 65-125
. Principle is the same as DN 5-50, except there is no mark
which shows how the
D
p changes at one turn of the setting
wheel and also there is no fixing screw and no leaden seal
to secure the setting.
2. The setting wheel (0) moves indirectly by the middle nut
(), which is turned by the batons supplied with the
controller.
3. The pressures can be controlled through pressure gauges
on the pipeline.
∆
p = min
∆
p = max
Sizing
Select the size according to maximal speed. To prevent noise, maximal speed should not exceed 2 m/s in residential buildings
and 3 m/s in industrial buildings. Control the pressure drop in the valve by formula:
D
p = 00 x q
2
/ Kvs
2
[kPa], where q is flow in m
3
/h.
Tour & Andersson retains the right to make changes to its products and specifications without prior notice.