Data Sheet Radiator thermostats for one-pipe and two-pipe systems
2 VD.51.Q1.12 © Danfoss 10/2003 DKCD
Valve bodies for two-pipe systems type RA-FN
1) Remote sensors are recommended
2) Kvs-maximum indicates the water flow (Q) with valve fully open
Selection and specification
Should water treatment be
used it is essential that dosing
instructions of the manufacturer
are strictly observed. It is
recommended that formulations
containing mineral oil are
avoided.
RA 2910 013G2910 Built-in 5 - 26 °C (1)
RA 2920 013G2920 Built-in, tamper proof 5 - 26 °C (1)
RA 2914 013G2914 Built-in, low temperature range model 5 - 22 °C (1)
RA 2912 013G2912 Remote sensor, 0 - 2 m capillary tube (2) 5 - 26 °C
RA 2922 013G2922 Remote sensor, 0 - 2 m capillary tube, tamper proof (2) 5 - 26 °C
RA 2916 013G2916 Remote sensor, 0 - 2 m capillary tube (2) 5 - 22 °C
RA 5062 013G5062 Remote temperature adjuster, 0 - 2 m capillary tube (3) 8 - 28 °C
RA 5065 013G5065 Remote temperature adjuster, 0 - 5 m capillary tube (3) 8 - 28 °C
RA 5068 013G5068 Remote temperature adjuster, 0 - 8 m capillary tube (3) 8 - 28 °C
Type Code no. Sensor (Max. sensor temperature 60°C)
Temp. range
Xp = 2K
RA2000 thermostatic sensors (4) supplied in separate boxes
(1) Temperatures shown are for units with built-in
sensors which are subject to influence from
radiation and flow temperature. Without these
influences, max. temperature is 2 °C higher at de-
sign load condition.
(2) Remote sensors are supplied with all the
capillary tube coiled within the sensor. When
installing the sensor, only the length required
should be uncoiled.
(3) Remote temperature adjusters are supplied with
adapters for RA-valves. Adaptors for older valves
can be ordered separately:
RAVL-adaptor, code no. 013G5192
RAV-adaptor, code no. 013G5193
(4) Important note: Do not use any RA2000
sensors with RA-FR bi-directional valve bodies.
(1) These valve bodies are supplied with compression
fittings for copper tube to BS 864. When these
connections are removed, a standard BSP screwed
inlet BS 21 remains.
(2) Kvs-maximum indicates the water flow (Q) with valve
fully open.
(3) Remote sensors are recommended.
Working pressure = static + differential pressures. The
maximum differential pressure specified is the maximum
pressure at which the valves give satisfactory control. As with
any device which imposes a pressure drop in the system,
noise may occur under certain flow/pressure conditions. To
ensure quiet operation, maximum pressure drop should not
exceed 40 to 45 kPa. The differential pressure can be
reduced by the use of Danfoss differential pressure controls.
When using RA2000 remote temperature adjusters the kv-values stated in the table above must
be reduced by approximately 40% to take into account the different characteristics of these
sensors.
Valve bodies for one-pipe pumped or gravity systems, type RA-G
kv-value
(m
3
/h at 1 bar pressure drop)
P-band = K
013G3384
013G3386
013G3388
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