Data Sheet
Radiator Thermostats for Domestic 2-Pipe
System RAS-D Range
Application
RAS-D built-in
sensor
RAS-D radiator thermostats are designed for use
in 2-pipe domestic heating systems.
All RAS-D Combi Packs comprises either a RA-FS
angled pattern bi-directional valve or a RA-FN
straight valve and a RAS-D sensor designed for 2pipe heating systems. Combi Packs are also
available with a RLV-D lockshield valve. For
further data on the lockshield valve please see
separate RLV-D data sheet.
The RA-FS have a ½” BSP (R½”) tail piece
connection to the radiator and are available with
15mm, 10mm or 8mm compression fitting or an
elbow with 10mm push-fit fitting to connect the
valve to the pipe work.
The RA-FS valve bodies are reversible and bidirectional and include a flow-selectable feature
to ensure trouble free installation without any
risk of water hammer. For optimum performance,
Danfoss recommend the sensor be mounted
horizontal where at all possible.
RAS-D remote
sensor
RAS-D Combi
6150, 6155
RAS-D Combi
5146
The straight RA-FN have a ½” BSP (R½”) tail piece
connection to the radiator and is available with
15mm compression fitting is not bi-directional.
All valves are supplied with a protective cap,
which can be used for manual regulation during
the construction phase. The cap must not be
used as a manual shut of device.
RAS-D sensors are equipped with a snap-lock
mechanism, which ensures a quick, firm
mounting to the valve without the need of tools.
Both built-in and remote sensors are available in
the RAS-D range. RAS-D incorporate a “Frost
Protection” setting and a “Positive Off” feature for
maximum user flexibility. Temperature range is
from 8°C to 28°C.
RAS-D Combi 6101
System
Note: Remote sensors can be used in all applications.
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Data Sheet Radiator Thermostats for Domestic 2-Pipe System RAS-D Range
Design
Ordering
Valve bodies are manufactured from brass with nickel
plating. The spindle in the gland seal is of chrominium
steel and works in a lifetime lubricated o-ring. The
complete gland assembly can be replaced without
draining down the system.
Valve bodies and RAS-D thermostatic sensors supplied complete in Combi-pack form:
Symbol Type Code no. Comprising
RAS-D
Combi 6150
013G6150 15 mm bi-directional angle valve
1. Actuator
2. Setting dial
3. Safety spring
4. Gland seal
5. Pressure pin
6. Snap-lock mechanism
7. Spindle
8. Bi-directional valve cone
9. Revolver
10. Valve body
body and thermostatic sensor
(includes positive shut-off)
Temp.
range °C
Xp = 2K
8 - 28
RAS-D
Combi 6155
RAS-D
Combi 6160
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013G6155 8/10 mm bi-directional angle
valve body and thermostatic
sensor (includes positive shutoff)
013G6160 Bi-directional angle valve body,
thermostatic sensor incl. positive
shut-off and elbow with 10 mm
push-fit fitting
8 - 28
8 - 28
Data Sheet Radiator Thermostats for Domestic 2-Pipe System RAS-D Range
Symbol Type Code no. Comprising
Temp.
range °C
Xp = 2K
RAS-D
013G5146 15 mm straight valve body and
Combi 5146
RAS-D
013G6102 15 mm bi-directional angle valve
Combi 6102
RAS-D
013G6103 8/10 mm bi-directional angle
Combi 6103
RAS-D
013G6104 Bi-directional angle valve body,
Combi 6104
RAS-D thermostatic sensors supplied in separate boxes:
8 - 28
thermostatic sensor (includes
positive shut-off )
8 - 28
body, lockshield valve and
thermostatic sensor (includes
positive shut-off)
8 - 28
valve body, lockshield valve and
thermostatic sensor (includes
positive shut-off)
8 - 28
lockshield valve, thermostatic
sensor incl. positive shut-off and
elbow with 10 mm push-fit
fitting
Temp. range °C
Symbol Type Code no.
RAS-D 013G5120
Sensor - Max sensor
temperature 60°C
Built-in (includes
positive shut-off)
Xp = 2K
8 - 28
Remote, 0-2 m
RAS-D 013G5022
capillary tube1) (no
8 - 28
positive shut-off)
1)
The remote sensor is delivered with all capillary tube coiled within the sensor. When mounting the
sensor capillary should be pulled out to required length.
Valve bodies for two-pipe systems type RA-FS (Bi-directional) and RA-FN with RAS-D sensors:
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Data Sheet Radiator Thermostats for Domestic 2-Pipe System RAS-D Range
Type Code no. Design Connections kv-value (m3/h at ∆p = 1 bar)
P-band (K)
0.5 1.0 2.0 3.0 k
Max. working
Test bar
temp. °C
RA-FS 15
1)
013G6281
013G6283
Rev. angle
RA-FN 15 013G0084 Straight
RA-FS 15
elbow
Type Code no.
RA-FS 15
1)3)
with push-fit
1)
Rev. angle
Working bar
013G6281
013G6283
Inlet Outlet
15 mm
8/10 mm
15 mm/
1/2"BSP
10 mm pushfit
1/2" BSP 0.13 0.27 0.50 0.64 0.73
1/2" BSP 0.14 0.27 0.52 0.70 0.90
1/2" BSP 0.13 0.27 0.50 0.64 0.73
Max. pressure
Diff.(∆p) bar
2)
10 0.6 16 120
RA-FN 15 013G0084 10 0.6 16 120
RA-FS 15
1)
2)
1)3)
with push-fit elbow
RA-FS valves must only be used with RAS-C2 or RAS-D sensors.
To ensure quiet operation, maximum pressure drop over the valve should not exceed 0.45bar (45
3 0.6 6 92
kPa). The differential pressure can be reduced using Danfoss automatic by-pass valve AVDO.
3)
Only available in Combi Packs.
The push-fit fitting is suitable for 10mm copper pipes manufactured in accordance to BS 2871
part 1 /BS EN 1057 : 1996 and suitable for 10mm polybuthelene (PB) including Hep2O,
Polyplumb, OsmaGold and 10mm cross linked polyethylene (PEX) pipes including Speedfit and
Equator, made in accordance to BS 7291 part 1 : 1990 or part 3 : 1990.
vs
Approved to EN 215
Quality Standards
Always use plastic pipe inserts of the same brand as the pipe used.
All Danfoss RAS-D sensors and RA-FS & RAFN valves are manufactured to the highest
standards and are approved to the
European standard EN215, which
supersedes BS 6284, 1983.
All Danfoss radiator thermostats and valves are
manufactured in factories, assessed and certified
by BSI against ISO 9001 / BS 5750.
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Data Sheet Radiator Thermostats for Domestic 2-Pipe System RAS-D Range
Capacities
All RAS-D Combi: capacity with P-band between 0.5K and 3K
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Data Sheet Radiator Thermostats for Domestic 2-Pipe System RAS-D Range
Dimensions
Valve Setting
Mounting
Commissioning the valve
The valve is a bi-directional valve with a flow
direction selection feature. This feature does not
have to be used, although we recommend that it
is set during system commissioning.
- Establish the flow direction through the valve
using the diagrams above, turning the setting
ring as necessary to ensure that water flow
For best performance fit valve in flow with sensor horizontal.
through the valve is always in the correct
direction and the risk of water hammer is
eliminated.
- If the flow direction needs to be changed there
is no need to remove the valve, simply turn the
setting ring.
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Data Sheet Radiator Thermostats for Domestic 2-Pipe System RAS-D Range
When using straight pattern valves, observe flow direction stamped on body.
Do not cover sensor with curtains or expose to extraneous heat gain, if in doubt fit remote sensor.
Accessories
Symbol Code no. Description
013G0290 RA 2000 gland seals (sold in boxes of 10)
013G5001 Blanking cap (sold singly)
013G5242 Theft protection devices (sold in bags of 20)
013G4912 Collet cover for push-fit connection (10pcs.)
013G4913 Collet clip for push-fit connection (10pcs.)
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Data Sheet Radiator Thermostats for Domestic 2-Pipe System RAS-D Range
Danfoss Randall Ltd.
Ampthill Road
Bedford
MK42 9ER
Telephone: 01234 36 46 21
Fax: 01234 21 97 05
E-mail: danfossrandall@danfoss.com
www.danfoss-randall.co.uk
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products
already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective
companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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