Danfoss RA-N Radiator Valves Data sheet

Data Sheet

RA-N Radiator Valves with Integrated Presetting and Self-Sealing Tailpiece

Application

Straight version

Angle version

Horizontal angle version

Approved to EN 215

Quality

All RA-N valve bodies can be used together with all types of thermostatic elements in the RA 2000 series and with TWA-A thermal actuators.

RA-N valves are used in two-pipe heating systems and are available in series D and series F to fit local standards.

The valve bodies are equipped with a self-sealing tailpiece featuring an O-ring seal.

RA-N valves are fitted with a kv-limiting device for

pre-setting of max. water flow and are available with the following setting ranges:

RA-N 15: kv = 0.04 - 0.73 m³/h

Each valve body is supplied with a red protective cap, which can be used for manual regulation during the construction phase.

The protective cap must not be used as a manual shut off device. A special manual shut off device is available as an accessory.

RA-N radiator valves with integrated presetting and self-sealing tailpiece are manufactured to the highest standards,

and are approved to the European standard EN 215.

All Danfoss RA 2000 radiator thermostats are manufactured to the highest standards, and are approved to the European standard EN 215.

RA-N valve bodies are manufactured from brass with nickel plating.

The pressure pin of the gland seal is of chromium steel and works in a lifetime lubricated O-ring. The complete gland seal assembly can be replaced without draining down the system.

In order to avoid deposition and corrosion the composition of the hot water must be in accordance with the VDI 2035 guideline (Verein Deutscher Ingenieure).

It is recommended that formulations containing mineral oil are avoided.

A comprehensive range of compression fittings for PEX, AluPEX, copper and steel tubes are available - please require special data sheet for Danfoss compression fittings.

All Danfoss radiator thermostats are manufactured in factories, assessed and certified by BSI (British Standards Institution) against ISO 9000 and ISO14001.

Danfoss Heating Solutions

VDSXL202

02/2011

Data Sheet	RA-N Radiator Valves with Integrated Presetting and Self-Sealing Tailpiece

Presetting	The presetting values of RA-N 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. 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 one-pipe installations, the setting N must be used.

1	2
3

Settings outside 1 to 7 and N should be avoided.

When the thermostatic sensor has been installed, the presetting is protected against unintended regulation.

1.Presetting range

2.Factory setting and one-pipe system

3.Reference mark

Data and Ordering

Connections

Max. work.

Max. diff.1)

Test

Max. work.

Type

Design

Inlet

Outlet

press.

temp.

Code no.

bar

˚C

Angle, F

013G0113

Straight, F

013G0114

RA-N 15

Angle, D

1/2

0.6

120

013G0115

Straight, D

013G0116

Horiz. angle, D

013G0117

Pre-setting

Type

Design

kv-max.2) (m³/h at Δp = 1 bar)

kvs

Angle, F

RA-N

Straight, F

Angle, D

0.04

0.09

0.16

0.25

0.36

0.43

0.52

0.73

0.90

Straight, D

Horiz. angle, D

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 types AVD, AVDL, AVDS, IVD or ASV-P.

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.

VDSXL202

02/2011

Danfoss Heating Solutions

Data Sheet	RA-N Radiator Valves with Integrated Presetting and Self-Sealing Tailpiece

Accessories
Accessories	Product	Dimension	For valve body	Code no.

	Gland seal		All RA valves	013G0290

		Rp 1/2 x Ø 10		013G4110
	Compression fittings for steel and copper tubes	Rp 1/2 x Ø 12	RA-N 15	013G4112
		Rp 1/2 x Ø 15		013G4115

All accessories comes in boxes of 10 pcs.

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 the thermostatic elements of the RA 2000 series and the valve body RA-N. The element and the valve body are ordered separately.

Valve body and other metal	Ms 58, brass
parts

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.

A clamping band with Allen screw ensures a simple, firm connection between element and valve body. The gland seal of the valve can be changed in operation, i.e. with water and pressure on the system.

Max. ambient temperature	60 ˚C

Max. medium temperature	120 ˚C

Max. working pressure	10 bar

Test pressure	16 bar

Principles

Danfoss Heating Solutions

VDSXL202

02/2011

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