Danfoss RA-G Data sheet
Data Sheet
High capacity valve body, type RA-G
Application
Quality
Systems
The high capacity valves, type RA-G, are primarily
used in one-pipe systems.
All RA-G valves can be combined with all thermostatic sensors in the RA-series.
All Danfoss RA-G high capacity valves are
manufactured to the highest standards, and
are approved to the European Standard EN
215.
The RA-G valves are tted with a grey protective
cap. This protective cap must not be used as a
manual shut o device. A special manual shut o
device is available (code no. 013G3300).
The pressure pin in the gland seal is of chromium
steel and works in a lifetime lubricated O-ring. The
complete gland seal assembly can be replaced
without draining the system.
In order to avoid depositions and corrosion the
composition of the hot water must be in accordance with the VDI 2035 Guidelines.
It is recommended that formulations containing
mineral oil are avoided.
1. One-pipe system, ow from top 2. One-pipe system, ow from bottom
3. Zone control application. Thermal actuator TWA
in combination with room thermostat/programmer.
VDSXR102 © Danfoss 11/2010
4. Danfoss Renovation+ with AB-QM and AB-QT
1
Data Sheet High capacity valve body, type RA-G
Ordering
Accessories
Max
ow
temp.
Code no.
Typ e Design
Connection kv-values [m3/h] P-Band [K]
1)2)
Max. pressure
[bar]
In Out 0.5 1.0 1. 5 2.0 kvsWork. Di.3)Tes t °C
RA -G 15
RA-G 20
RA-G 25
1)
The kv-value indicates the water ow (Q) in m3/h at a pressure drop (∆p) across the valve of 1 bar. kv = V : √∆p.
The kvs-values state the ow (Q) at a maximum lift, i.e. at fully open valve.
2)
If a RAW/RAS-C/RAS-C2/RAS- D/RAX/RAE sensor or a remote sensor is used the P-band is extended by a factor 1.6.
3)
Working pressure = static + dierential pressure. The maximum dierential pressure specied is the maximum pressure
Angle Rp ½ R ½ 0.54 1.07 1.61 2.06 4.30 16 0.20 25 120 013G1676
Straight Rp ½ R ½ 0.51 0.94 1.35 1.63 2.30 16 0.20 25 120 013 G1675
Angle Rp / R / 0.57 1.11 1.16 2.20 5. 01 16 0.20 25 12 0 013G1678
Straight Rp / R / 0.54 1.07 1.61 2.06 3. 81 16 0.20 25 120 013G1677
Angle R
Straight R
R 1 0.59 1. 27 1.77 2 .41 5.50 16 0.16 25 120 013G16 80
p 1
R 1 0.57 1.16 1.71 2.27 4.58 16 0.16 25 120 013G1679
p 1
at which the valves give satisfactory regulation. As with any device which imposes a pressure drop in the system, noise
may occur under certain ow/pressure conditions. To ensure quiet operation, maximum pressure drop should not
exceed 30 to 35 kPa. The dierential pressure can be reduced by the use of the Danfoss dierential pressure regulators.
Product Size Code no.
Gland seal, 10 pcs.
RTD-CB back-ow restrictor
RTD-CB back-ow restrictor
RTD-CB back-ow restrictor
RTD-BR bypass restrictor
RTD-BR bypass restrictor
Service insert
Service insert
1)
The gland seal may be replaced with the heating system in operation.
2)
To avoid unintended heat emission from the radiator, it is recommended to install a ow restrictor, see further details
on ow restrictors in separate data sheet.
3)
Service inserts can only be replaced without water on the system.
1)
2)
2)
2)
2)
2)
3)
3)
- 013G 0290
DN 15 013 L192 5
DN 20 013 L192 6
DN 25 013 L192 7
DN 15/10 013 L1915
DN 20/15 013L1916
DN 15/ 20 013G170 6
DN 25 013G1707
2
VDSXR102 © Danfoss 11/2010
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