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Application
Straight version Angle version Horizontal angle version
All RA-N valve bodies can be used together withall types of thermostatic elements in the RA 2000series and with TWA-A thermal actuators.
RA-N valves are used in two-pipe heating systemsand are available in series D and series F to fitlocal standards.
The valve bodies are equipped with a self-sealingtailpiece featuring an O-ring seal.
RA-N valves are fitted with a kv-limiting device forpre-setting of max. water flow and are availablewith the following setting ranges:
RA-N 15: kv = 0.04 - 0.73 m³/h
Each valve body is supplied with a red protectivecap, which can be used for manual regulationduring the construction phase.
The protective cap must not be used as a manualshut off device. A special manual shut off deviceis available as an accessory.
RA-N valve bodies are manufactured from brasswith nickel plating.
The pressure pin of the gland seal is of chromiumsteel and works in a lifetime lubricated O-ring.The complete gland seal assembly can bereplaced without draining down the system.
In order to avoid deposition and corrosion thecomposition of the hot water must be inaccordance with the VDI 2035 guideline (VereinDeutscher Ingenieure).It is recommended that formulations containingmineral oil are avoided.
A comprehensive range of compression fittingsfor PEX, AluPEX, copper and steel tubes areavailable - please require special data sheet forDanfoss compression fittings.
Approved to EN 215 RA-N radiator valves with integratedpresetting and self-sealing tailpiece aremanufactured to the highest standards,
and are approved to the European standard EN215.
Quality All Danfoss RA 2000 radiator thermostats aremanufactured to the highest standards, and areapproved to the European standard EN 215.
All Danfoss radiator thermostats aremanufactured in factories, assessed and certifiedby BSI (British Standards Institution) against ISO9000 and ISO14001.
Data Sheet
RA-N Radiator Valves with Integrated Presettingand Self-Sealing Tailpiece
Presetting The presetting values of RA-N valves can beadjusted easily and accurately without the use oftools (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. Atsetting N the valve is fully open. This setting canbe used as a flushing position, if the system hasto be flushed out because of dirt problems. Inone-pipe installations, the setting N must beused.
Settings outside 1 to 7 and N should be avoided.
When the thermostatic sensor has been installed,the presetting is protected against unintendedregulation.
1 2
3
1. Presetting range2. Factory setting and one-pipe system3. Reference mark
1) Working pressure = static + differential pressure. The maximum differential pressure specified is themaximum pressure at which the valves give satisfactory regulation. As with any device which imposesa pressure drop in the system, noise may occur under certain flow/pressure conditions. To ensure quietoperation, maximum pressure drop should not exceed 30 to 35 kPa. The differential pressure can bereduced 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. Thekvs-value states the flow Q at a maximum lift, i.e. at fully open valve at setting N.
Data Sheet RA-N Radiator Valves with Integrated Presetting and Self-Sealing Tailpiece
The radiator thermostats consist of thethermostatic elements of the RA 2000 series andthe valve body RA-N. The element and the valvebody are ordered separately.
Valve body and other metalparts
Ms 58, brass
Kv-limiter PPS
O-ring EPDMValve cone NBRPressure pin and valve spring Chrome steelNozzle PP
A clamping band with Allen screw ensures asimple, firm connection between element andvalve body. The gland seal of the valve can bechanged in operation, i.e. with water andpressure on the system.
Max. ambient temperature 60 ˚CMax. medium temperature 120 ˚CMax. working pressure 10 barTest pressure 16 bar
The valve bodies are nickle-plated on the outside.
Principles
Data Sheet RA-N Radiator Valves with Integrated Presetting and Self-Sealing Tailpiece
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 productsalready 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 respectivecompanies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.