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RA-N Valves with Pre-Setting
- Provides accurate flow regulation in 2-pipe systems.
- Wide range of valve body sizes available
- Easy to set adjustment, does not affect valve lift
- Concealed setting, prevents unauthorised adjustment
- Available in straight, vertical angle and horizontal angle patterns
- Compatible with all RA2000, RAS-C2 & RAS-D2 sensors
For use in commercial 2-pipe systems. RA-N valves are available in 3/8”, 1/2” and 3/4” sizes in angled and straight pattern versions. RA-N valves can be used with all RA2000, RAS-D2 & RAS-C2 sensors, although valve capacity is reduced if RAS-C2 or RAS-D2 sensors are used.
Valves with pre-setting allow the commissioning engineer to precisely set the calculated flow of water to individual radiators without the need for costly and inaccurate temperature measurements. They also reduce the function of the lockshield valve to one of isolation rather than regulation.
In the Danfoss Randall range, pre-setting is achieved by means of a separate pre-setting device integrated into the valve body, and does not interfere in any way with the degree of opening of the valve cone, as seen with other pre-setting systems.
Pre-setting is achieved by means of a calibrated setting ring on the valve body, which is covered once the radiator thermostat is mounted.
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Technical data
Documentation
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Catalogue
RA2000 Range Comm TRVs - Brochure
410.pdf
(4.2 Mb), Literature number: VKYFA112, Language: UK English, Release date: 01/03 2006
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Data sheet
RA-N valves with integrated presetting (international)
VDSXH102_RA-N_international.pdf
(0.7 Mb), Literature number: VDSXH102, Language: English, Release date: 19/03 2009
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Thermostatic sensor RAS-C2 with RA-N radiator valve
VDAVE102_RAS-C2.pdf
(1.1 Mb), Literature number: VDAVE102, Language: English, Release date: 07/04 2009
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Valve bodies, type RA-N
VDTYA102_RA-N_valves.pdf
(0.7 Mb), Literature number: VDTYA102, Language: English, Release date: 28/10 2005
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Multimedia
About Hydronic Balancing
Flash animation about hydraulic balancing.swf
(0.1 Mb), Literature number: VVTYN102, Language: English, Release date: 04/10 2006
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Animated guide: Operating principle of Danfoss radiator thermostats
operation_princip_facelift.swf
(0.1 Mb), Literature number: VVTTD102, Language: English, Release date: 06/03 2007
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Animation illustrating the functionality of presetting the RA-N valve
Flash animated guide to RA-N presetting.swf
(0.0 Mb), Literature number: VVTWZ102, Language: English, Release date: 14/09 2005
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Slide ruler for easy pre-setting of valves
Danfoss DK 2006.exe
(1.5 Mb), Literature number: VVTYD102, Language: English, Release date: 04/10 2006
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Thermostatic Radiator Valves - See how they work
TRV_euro.swf
(2.5 Mb), Literature number: VVFNA102, Language: English, Release date: 09/10 2009
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