Danfoss RA-N PURE 10, RA-N PURE 15, RA-N PURE 20 Data sheet
Data Sheet
RA-N / RA-U PURE radiator valves with
presetting
Application
Ordering and
Technical Data
RA-N PURE straight RA-N PURE Angle
All RA-N/ RA-U PURE valve bodies can be used
off device is available as an accessory.
RA-U PURE
together with all types of thermostatic elements
in the RA 2000 series and with TWA-A thermal
actuators.
RA-N/ RA-U PURE valve bodies are manufactured
from Eco brass contains less than 0.1% lead with
nickel plating.
RA-N/ RA-U PURE valves are used in two-pipe
heating systems and comes in series S.
The pressure pin of the gland seal is of low lead
metal and works in a lifetime lubricated O-ring.
RA-N/ RA-U PURE valves are fitted with a kv limiting
device for pre-setting of max. water flow and
The complete gland seal assembly can be
replaced without draining down the system.
are available with the setting ranges: in the table
below.
In order to avoid deposition and corrosion the
composition of the hot water must be in accordance
Each valve body is supplied with a protective cap,
which can be used for manual regulation during
the construction phase. This cap must not be used
with the VDI 2035 guideline (Verein Deutscher
Ingenieure). It is recommended that formulations
containing mineral oil are avoided.
as a manual shut off device. A special manual shut
Connections Pre-setting
Type Design
RA-N PURE 10
with lock
RA-N PURE 10
RA-N PURE 15
RA-N PURE 20 Straight 3/4 3/4 0.10 0.15 0.17 0.26 0.35 0.46 0.73 1.04 1.40 015G0076
Straight 3/8 3/8 0.04 0.08 0.12 0.19 0.25 0.33 0.38 0.56 0.65 015G4022
Angle 3/8 3/8 0.04 0.08 0.12 0.19 0.25 0.33 0.38 0.56 0.65 015G0071
Straight 3/8 3/8 0.04 0.08 0.12 0.19 0.25 0.33 0.38 0.56 0.65 015G0072
Angle 1/2 1/2 0.04 0.08 0.12 0.20 0.30 0.40 0.51 0.73 0.90 015G0073
Straight 1/2 1/2 0.04 0.08 0.12 0.20 0.30 0.40 0.51 0.73 0.90 015G0074
Out-
let
Rp R 1 2 3 4 5 6 7 N
kv-max.1) (m3/h at Δp = 1 bar)
Code noInlet
k
vs
Quality
Type Design
RA-U PURE 10
with lock
Straight 3/8 3/8
Connection Pre-setting
Code noInlet Outlet kv-max.1) (m3/h at Δp = 1 bar)
k
Rp R 1 2 3 4 5 6 7 8 9 10 11 N
0.016 0.025 0.035 0.05 0.06 0.08 0.10 0.12 0.16 0.21 0.26 0.28 0.30
1)
The kv-value indicates the water flow (Q) in m3/h at a pressure drop (∆p) across the valve of 1 bar; kv = Q: √ ∆p. At setting N the
kv-value is stated according to EN 215, at XP = 2K i.e. the valve is closed at 2°C higher room temperature. At lower settings the XP
value is reduced to 0.5K of the setting value 1.
The kvs-value states the flow Q at a maximum lift, i.e. at fully open valve at setting N.
2)
Working pressure = static + differential pressure. The maximum differential pressure specified is the maximum pressure at
which the valves give satisfactory regulation. 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 30 to 35 kPa. The
differential pressure can be reduced by the use of the Danfoss differential pressure regulators types AB-PM , ASV-P or ASV-PV.
vs
015G3022
RA-N/ RA-U PURE valves are 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.
© Danfoss Climate Solutions | 02/2022 | AI403040432014en-000101
1
Datasheet
RA-N / RA-U PURE radiator valves with presetting
Accessories
Typ e Code Number
Presetting key for RA-U valves & also RA-N with lock 013G3028
p tool for pump optimization 013G7861
PFM100 measuring instrument 003L8260
PURE gland-seal 015G 0290
Service insert, Lock, RA-N 10, PURE 015G3018
Service insert, RA-N 10, PURE 015G3063
Service insert, RA-N 15, PURE 015G3073
Presetting
The presetting values of RA-N/ RA-U PURE valves
can be adjusted easily and accurately without the
use of tools (factory setting = N):
• Remove protective cap / thermostatic sensor
• Find reference mark
• Lift and turn setting ring until the aquired
presetting aligns with the reference mark.
Presetting can be selected in steps from 1 to 7.
(RA-U PURE 10 pre-setting steps from 1 to 11). 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. In onepipe installations, the setting N must be used.
Settings outside 1 to 7 and N should be avoided.
When the thermostatic sensor has been installed,
the presetting is protected against unintended
regulation.
Presetting
Reference mark
range
Factory setting and
one-pipe system
2
© Danfoss Climate Solutions | 02/2022 | AI403040432014en-000101
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