Publicité
4
Construction and function
4.1
Summary and functional description
The Oventrop circulation regulating valve "Aquastrom
DT" is installed in the return pipes of circulation systems.
It serves to achieve an exact hydronic balance between
the circulation risers and a cooling-down of the individual
risers will be avoided if the system calculation according
to W553 is carried out correctly.
The valve is additionally equipped with a valve for draining
of the risers.
5
Technical data circulation
regulating valve
5.1
Performance data
Max. operating temperature t
Fluid:
Residual volume flow:
Max. volume flow:
Max. control range:
Recommended control range: 55 °C up to 60 °C
Factory setting:
Max. ambient temperature: 90°C
Max. differential pressure ∆P: 1bar
Max. operating pressure p
Installation position:
Connections:
!
DANGER
Suitable measures (e.g. safety valves) have
to be taken to ensure that the maximum
operating pressures and maximum and
minimum operating temperatures are not
exceeded or undercut.
5.2
Markings
Information on the body:
OV
Oventrop
DN
Size
PN
Nominal pressure
Rg
Bronze
5.3
Materials
Components in contact with the fluid:
Bronze, brass, stainless steel, EPDM, PTFE
8
: 90°C
s
Potable water
DN 15 kV 0.09 m³/h
DN 20 kV 0.37 m³/h
DN 25 kV 0.49 m³/h
DN 15 kV 1.5 m³/h
DN 20 kV 1.6 m³/h
DN 25 kV 1.7 m³/h
40 °C up to 90 °C
57 °C
: 10 bar
s
Any, easily accessible
Male thread, flat sealing,
according to ISO 228
Female thread according
to EN 10226-1
5.4
Dimensions/Connection sizes
Item no.:
DN
1150004
15
1150104
15
1150006
20
1150106
20
1150008
25
1150108
25
Dimensions
5.5
Control curve
Illustr. 5.2 Control curve at ∆p = 100 mbar
The return pipes of a circulation system have to be
sized according to the valid calculation procedures!
(see also DVGW work sheet W553) The calculation of
a circulation system is to be documented in order to
carry out any subsequent modifications or extensions
of the system (see also W551).
Calculation of a potable water circulation system can
be carried out with the help of the Oventrop software
OVplan which is available on the free Oventrop DVD.
!
DANGER
Circulation valves which are sized or set
wrongly, do not ensure a hydronic balancing
of the circulation risers. As a result, the return
pipes might cool down below the temperature
required according to W551 and this in turn
presents a risk of germs or legionella
development within the system!
A
B
C
Rp
⁄
110
189.5
1
2
G
⁄
110
189.5
3
4
Rp
⁄
123
183
3
4
G 1
123
183
Rp 1
133
178
G 1
⁄
133
178
1
4
Voltage [V]
Publicité
