Page 1
Data Sheet
Steel Valve for Convectors
in One-pipe Heating Systems
Application
Ordering and
Specifications
The steel valve is designed for welding into convectors by the manufacturer.
The complete valve consists of a steel valve body
and a large capacity valve insert with fixed flow
through the valve. The insert has connection for
all Danfoss RA 2000 thermostatic sensors.
The flow capacity of this valve is designed for
one-pipe heating systems.
Part Code no.
Valve insert with RA 2000 sensor connection 013G1805
Steel valve body, straight pattern, welding connections 013G1801
Spare part: Gland seal for valve insert, 10 pcs/pack 013L0669
Spare part: Cover cap, green 013G8469
Type
RA-G valve, incl. cap 0.05 - 0.1 bar 0.15 bar 25 bar 16 bar 120˚ C 013G1809
Differerential pressure
Recomm. Technical
1)
pressure
Test
Work.
pressure
Max. water
temperature
Code no.
RA-G 013G1809
kV-value
1)
The maximum differential pressure specified is the maximum pressure at which the valves give satisfactory
2)
The kv-value indicates the flow volume (Q) in m3/h at a given lift and a pressure drop (p) across the valve
2) (m3
/h at ∆p =1 bar) 0.55 1.11 1.63 2.14 3.07 4.32
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 0.3 to
0.35 bar. The differential pressure can be reduced by the use of the Danfoss differential pressure regulators.
at 1 bar. kv = Q / √∆p. The kvs-value states the flow Q at a maximum lift, i.e. at fully open valve. If a remote
temperature adjuster is used, the P-band is increased by a factor of 1.1.
VDFOF102 © Danfoss 08/2012
0.5 1.0 1.5 2.0 3.0
P-band (K)
k
VS
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Data Sheet Steel Valve for Convectors in One-pipe Heating Systems
35
69
Design and Handling
Dimensions
Materials in contact with water
Valve body Welding proof ASTM steel
Valve top Ms 58
Valve seat ASTM steel
O-rings NBR / EPDM
Valve spindle Ms 58
Valve cone NBR
Pressure pin and valve spring Chrome steel
To avoid calcification and corrosion, it is important for the composition of the circulating water to comply
with the VDI 2035 guidelines.
Replacing the gland seal
36,5
1. The gland seal can be replaced with the
system in operation. Use a 10M spanner to
remove the old gland seal.
28
32,5
70
2. After replacing the gland seal , test if the
valve spindle is operating freely.
2
VDFOF102 © Danfoss 08/2012
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Data Sheet Steel Valve for Convectors in One-pipe Heating Systems
Mounting Instructions
Note!
Valve body and insert should always be handled
with utmost care. Keep in original packing until
final use. Any damage may result in malfunction
of the valve.
Max.
70°C
Min. 120 mm
1. Lubricate valve insert by dipping in water. 2. Apply insert to housing and tighten by hand.
Be aware of the max. temperature, not to
destroy the o-ring when applying the insert.
x 12
3. Tighten insert with a 21M spanner, torque 30
Nm ± 10%.
30 N
30.4 ± 0.4 mm
4. To ensure closing measure of the valve, load
the spindle with a force of 30 N until stop,
and measure as shown.
A special tool for control is available.
5. A leak test has to be carried out according to
procedures stated by the convector manufacturer.
VDFOF102 © Danfoss 08/2012
6. Fit green protection cap and tighten by
hand.
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Data Sheet Steel Valve for Convectors in One-pipe Heating Systems
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
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VDFOF102 © Danfoss 08/2012
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