Danfoss RA-UN, RA-UR Data sheet

Data Sheet

Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal

Application

Approved to EN 215

Quality Standards

RA-UN, Straight

Angle

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	kv = 0.02 - 0.48 m³/h
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.

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).

UK-angle RA-UR

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.

Danfoss Heating Solutions

VDTYG202

© Danfoss

02/2011

1

Data Sheet	Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal

Principles

Data and Ordering

Connections

Max. work.

Max. diff.1)

Test

Max. work.

Type

Design

Inlet

Outlet

press.

press.

temp.

Code no.

Rp

R

bar

bar

bar

˚C

Angle

013G3721

RA-UN 10

Straight

3/8

3/8

013G3722

UK

013G3741

Angle

10

0.6

16

120

013G3723

RA-UN 15

Straight

1/2

1/2

013G3724

UK

013G3043

RA-UN 20

Angle

3/4

3/4

013G3005

Straight

013G3006

Angle

013G3299

RA-UR 10

Straight

3/8

3/8

013G3298

UK

10

1.0

16

120

013G3297

RA-UR 15

Angle

1/2

1/2

013G3229

Straight

013G3228

Pre-setting

Type

Design

kv-max.2) (m³/h at Δp = 1 bar)

kvs

1

2

3

4

5

6

7

N

N

Angle

RA-UN 10

Straight

UK

Angle

0.02

0.04

0.07

0.12

0.19

0.27

0.33

0.48

0.57

RA-UN 15

Straight

UK

RA-UN 20

Angle

Straight

Angle

RA-UR 10

Straight

UK

0.02

0.03

0.06

0.08

0.14

0.20

0.27

0.47

0.53

RA-UR 15

Angle

Straight

2

VDTYG202

© Danfoss

02/2011

Danfoss Heating Solutions

Data Sheet	Valve Bodies Type RA-UN and RA-UR with Delta Gland Seal

Accessories

Setting

Operating Principle

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

Product	Dimension	For valve body	Code no.
Delta seal		All RA valves	013G0297
	Rp 3/8 x Ø 10	RA-UN/RA-UR 10	013G4100
Compression fittings for steel and copper tubes, incl.	Rp 3/8 x Ø 12		013G4102
	Rp 1/2 x Ø 10		013G4110
compression ring and nipple
	Rp 1/2 x Ø 12	RA-UN/RA-UR 15	013G4112
	Rp 1/2 x Ø 15		013G4115

Accessories are sold in boxes of 10.

Presetting area

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	The element and the valve body are ordered
thermostatic element of the RA 2000 series and a	separately.
valve body.

Danfoss Heating Solutions

VDTYG202

© Danfoss

02/2011

3