Data Sheet
RAS-B² Dynamic TRV
Application
Ordering
Danfoss RAS-B radiator valve is a pressure
independent radiator valve, designed for use in
2-pipe heating systems.
RAS-B dynamic valves are fitted with a flow
limiting device for presetting of the maximum
water flow. The valves are available with maximum water flow of 10 - 135 l/h.
RAS-B has a built-in pressure regulator, which
keeps the differential pressure over the valve at a
constant level of 0.1 bar, maintaining the set flow.
Dynamic valves are supplied with a protective
cap, which can be used for manual regulation during the construction phase.
The protective cap must not be used as manual
shut off device. A special manual shut off device
(code no. 013G5002) should be used.
RAS-B² Pack Contents:
Comprising
RAS-C², RA-DV 15mm 013G7660
To be able to distinguish between other valve
bodies of the Danfoss RA series the RAS-B
protective cap and presetting ring are green.
RAS-B valve bodies are manufactured from
brass with a nickel plating. The gland seal
pressure pin is chrominium steel and works in a
lifetime lubricated O-ring. The complete gland
seal assembly can be replaced without draining
down the system.
Should water treatment be used it is essential
that the manufacturer’s dosing instructions are
strictly observed. Formulations containing
mineral oil should be avoided.
In order to avoid deposition and corrosion the
composition of the hot water must be in
accordance with the VDI 2035.
Copper Pipe Fitting
Diameter
Code Number
RAS-C², RA-DV 10mm 013G7661
RAS-C², RA-DV, RLV-D 15mm 013G7662
RAS-C², RA-DV, RLV-D 10mm 013G7663
RAS-C², RA-DV, RLV-D,
with 10mm push-fit
fitting, drain off
RAS-C², RA-DV, RLV-D,
with 15mm push-fit
fitting, drain off
© Danfoss Climate Solutions | 02/2021 | AI358232615685en-GB0104
15mm 013G7664
15mm 013G7665
1
Data Sheet RAS-B² Dynamic TRV
!
Note the flow
direction
arrow
Accessories
Quality
Principles
Accessories Code no.
Gland seal, 10 pcs. 013G 0290
p tool for pump optimization 013G7861
Valve insert with Regulator 5 pieces 013G7831
RAS-C Sensor only 013G6040
Elbow with 10mm push fit
Elbow with 15mm push fit
Drain-off tailpiece 003L0105
Danfoss RAS-B Dynamic TRV is certified according to the European standard EN 215.
Danfoss radiator thermostats are manufactured in factories, assessed and certified by BVC
(Bureau Veritas Certification) against ISO 9001 and ISO 14001. against ISO 9001 and ISO 14001.
013G6270
013G6275
For the best
performance we
recommend fitting the
valve with the sensor
mounted horizontally.
Presetting
Vertical (Flow) Horizontal (Return)
The Danfoss RAS-B radiator valve can be fitted either vertically or horizontally.
NOTE: If you are not installing a Danfoss lockshield valve (supplied in sets code, 013G7662 & 013G7663)
ensure that the lockshield is fully open. No balancing on the lockshield/ return pipe.
The presetting values of RAS-B valves can be
adjusted easily and accurately without the use of
tools (default setting = N).
Presetting can be selected in steps from 1 to 7:
• Remove protective cap / thermostatic sensor.
• Find reference mark ().
• Turn setting ring until the aquired presetting
aligns with the reference mark.
At setting N the valve is fully open. This setting
can be used as a flushing position, if the system
has to be flushed out because of dirt problems.
When the thermostatic sensor has been installed,
the presetting is protected against unintended
regulation.
2
© Danfoss Climate Solutions | 02/2021 | AI358232615685en-GB0104
Data Sheet RAS-B² Dynamic TRV
160
[l/h]
0 10 20 30 40 50 60 ∆P [kPa]
Capacities
RA-DV max. flow
140
120
100
80
60
40
20
0
Sizing example
Required heat 700 W
Cooling across radiator 20 °C
Flow through radiator
Q =
20 x 1.16
= 30 l/h
700
Min. pressure for constant flow 0.1 bar
Valve setting* 2
*Alternatively the setting can be read directly in the table “Technical Data”.
Presetting
N
7
6
5
4
3
2
1
Technical Data
Max. working pressure
1)
10 bar
Max. differential pressure 0.6 bar
Min. differential pressure 0.1 bar
Test pressure 16 bar
Max. working temperature 95° C
Min. working temperature 2° C
Presetting 1 2 3 4 5 6 7 N
3)
• Max
• with RAS-C²
1)
Working pressure = static + differential pressure. The maximum differential pressure specified is the maximum pressure
at which the valves give satisfactor y regulation.
2)
At setting N the value is stated according to EN 215, at XP = 2K i.e. the valve is closed at 2° C higher room tempe rature. At
lower settings the XP value is reduced to 0.5K of the setting value 1. All values are max. flow at 0.1 bar.
3)
The value states the max. flow at maximum lift, i.e. at fully open valve at 0.1 bar.
10 l/h 15 l/h 20 l/h 35 l/h 50 l/h 80 l/h 100 l/h 135 l/h
8 l/h 12 l /h 16 l/h 25 l/h 40 l/h 65 l/h 85 l/h 110 l/ h
© Danfoss Climate Solutions | 02/2021 | AI358232615685en-GB0104
3
Data Sheet RAS-B² Dynamic TRV
Material
Size
Scale
Projection
1. Pressure pin
2. Gland seal
3. O-ring
4. Setting dial
5. Seal
6. Regulation spring
7. Valve body
8. Regulator
9. Spring
10.Impulse connection
114 mm
62.5 mm
23 mm
56 mm
24.5 mm
Design
1
2
3
4
5
6
7
8
9
10
The thermostatic radiator valve consist of a
sensor and the valve body RA-DV.
The gland seal of the valve can be changed in
operation, i.e. with water and pressure on the
system. Counter hold with star spanner number
17 and loosen the gland seal with spanner
number 10.
1. Pressure pin
2. Gland seal
3. O-ring
4. Setting dial
5. Seal
6. Regulation spring
7. Valve body
8. Regulator
9. Spring
10. Impulse connection
Materials in contact with water
Valve body and
other metal parts
Brass
Valve body surface Nickle plated
Flow-limiter PPS
O-ring EPDM
Valve cone NBR
Pressure pin and spring Chrome steel
Regulator Brass/PPS/EPDM
Dimensions
4
© Danfoss Climate Solutions | 02/2021 | AI358232615685en-GB0104
Loading...