Data Sheet
Valve Bodies Type RA-UN and RA-UR with Delta
Gland Seal
Application
RA-UN, Straight Angle UK-angle RA-UR
All RA-UN/UR valve bodies can be used together
with all types of thermostatic elements in the RA
2000 series.
The valve bodies are fitted with a kv limiting
device for pre-setting of max. water flow.
RA-UN is for mounting in the flow and RA-UR in
the return. An arrow on the valve body indicates
the direction of flow.
The valve body RA-UN/RA-UR is used in two-pipe
heating systems and is available with the
following setting ranges for max. water flow:
RA-UN
RA-UR kv = 0.02 - 0.47 m³/h
The valve bodies are supplied with a protective
cap and adjusting screw which can be used for
manual regulation during the construction
phase.
kv = 0.02 - 0.48 m³/h
The protective cap must not be used as a manual
shut off device. A special manual shut off device
(code no. 013G5000) should be used.
To be able to distinguish between other valve
bodies of the RA 2000 series the protective cap is
yellow.
Compression fittings for 15 mm, 10 mm or 8 mm
copper tube are available for valve body RA-UN/
UR with 3/8" and 1/2" BSP connections.
Valve bodies are manufactured from brass with
nickel plating. The pressure pin of 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.
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.
Approved to EN 215
Quality Standards
Danfoss Heating Solutions VDTYG202 © Danfoss 02/2011 1
All Danfoss RA 2000 radiator thermostats
are manufactured to the highest standards,
and are approved to the European
standard EN 215 and dimension standard
HD 1215-2, which superseeds BS 6284 1983.
All Danfoss radiator thermostats are
manufactured in factories, assessed and certified
by BSI against BS 5750 (ISO 9000).
Data Sheet Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal
Principles
Data and Ordering
Type Design
Angle
RA-UN 10
Straight 013G3722
UK 013G3741
Angle
RA-UN 15
Straight 013G3724
UK 013G3043
RA-UN 20
Angle
Straight 013G3006
Angle
RA-UR 10
Straight 013G3298
UK 013G3297
RA-UR 15
Angle
Straight 013G3228
Type Design
Angle
RA-UN 10
Straight
UK
Angle
RA-UN 15
Straight
UK
RA-UN 20
Angle
Straight
Angle
RA-UR 10
Straight
UK
RA-UR 15
Angle
Straight
press.
1)
Test
Max. work.
temp.
Code no.
Connections
Inlet Outlet
R
R bar bar bar ˚C
p
Max. work.
press.
Max. diff.
013G3721
3/8 3/8
013G3723
013G3005
1/2 1/2
3/4 3/4
10 0.6 16 120
013G3299
3/8 3/8
10 1.0 16 120
1/2 1/2
013G3229
Pre-setting
2)
k
(m³/h at Δp = 1 bar)
v-max.
1 2 3 4 5 6 7 N N
0.02 0.04 0.07 0.12 0.19 0.27 0.33 0.48 0.57
0.02 0.03 0.06 0.08 0.14 0.20 0.27 0.47 0.53
k
vs
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Data Sheet Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal
1)
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.
2)
The kv-value indicates the water flow (Q) in m³/h at a pressure drop (∆p) across the valve of 1 bar;
. 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. When using remote
setting adjusters or RAE sensors kv-values are reduced for identical P-band
Accessories
Setting
Product Dimension For valve body Code no.
Delta seal All RA valves 013G0297
Compression fittings for steel and copper tubes, incl.
compression ring and nipple
Rp 3/8 x Ø 10
Rp 3/8 x Ø 12 013G4102
RA-UN/RA-UR 10
Rp 1/2 x Ø 10
Rp 1/2 x Ø 12 013G4112
RA-UN/RA-UR 15
013G4100
013G4110
Rp 1/2 x Ø 15 013G4115
Accessories are sold in boxes of 10.
Presetting area
Operating Principle
1. Gland seal
2. O-Ring
3. Pressure pin
4. Seal
5. Regulation spring
6. Setting dial
7. Valve body
8. kv-nozzle
The radiator thermostats consist of a
thermostatic element of the RA 2000 series and a
The element and the valve body are ordered
separately.
valve body.
Danfoss Heating Solutions VDTYG202 © Danfoss 02/2011 3
Data Sheet Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal
Capacities
Valve body and other metal
parts Ms 58, brass
kv-limiter PPS
O-ring EPDM
Valve cone NBR
Pressure pin and valve spring Chrome steel
Nozzle PP
The valve bodies are nickle-plated on the outside.
RA-UN presetting diagram
Capacities with RA2000 sensor with a P-band between 0,5K and 2K
Max. ambient temperature 60 ˚C
Max. medium temperature 120 ˚C
Max. working pressure 10 bar
Test pressure 16 bar
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Data Sheet Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal
RA-UR presetting diagram
Capacities with RA2000 sensor with a P-band between 0,5K and 2K
Dimensions
Sizing example
Required heat: 0.7 kW = 700 W
Cooling across radiator: 30° C
Flow through
radiator:
Pressure drop across valve: ∆p = 1 mwg
Valve setting: RA-UN/RA-UR 2
Straight valve body with thermostatic sensor RA 2990
Alternatively the setting can be read directly in
the table "Data and Ordering":
Angle valve body with thermostatic sensor RA2992
Danfoss Heating Solutions VDTYG202 © Danfoss 02/2011 5
Data Sheet Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal
UK-angle valve body with thermostatic sensor RA
2990
Type
RA-UN 10
RA-UN 10 UK
RA-UN 15
RA-UN 15 UK
RA-UN 20
RA-UR 10
RA-UR 10 UK
RA-UR 15
D
Rp 3/8
Rp 3/8
Rp 1/2
Rp 1/2
Rp 3/4
Rp 3/8
Rp 3/8
Rp 1/2
d
2
ISO 7-1 S1 S2
L1L2L3L4L5L6L7L8L9L
10
R 3/8 60 85 27 52 22 47 96 22 27
R 3/8 59 108 26 51 22 22 27
R 1/2 67 95 30 58 26 47 96 27 30
R 1/2 60 109 29 57 27 27 30
R 3/4 74 106 34 66 29 47 96 32 37
R 3/8 60 85 28 53 22 47 96 22 27
R 3/8 47 96 28 53 27 22 27
R 1/2 67 95 28 53 27 47 96 22 27
Arc. flats
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Data Sheet Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal
Danfoss Heating Solutions VDTYG202 © Danfoss 02/2011 7
Data Sheet Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal
Danfoss A/S
Heating Solutions
Haarupvaenget 11
8600 Silkeborg
Denmark
Phone:+45 7488 8000
Fax: +45 7488 8100
Email: heating.solutions@danfoss.com
www.heating.danfoss.com
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.
8 VDTYG202 © Danfoss 02/2011 Danfoss Heating Solutions
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