Danfoss RA-G Data sheet
Data Sheet
High capacity valve body, type RA-G
Application
The high capacity valves, type RA-G, are primarily used in one-pipe systems.
All RA-G valves can be combined with all thermostatic sensors in the RA-series.
Quality |
All Danfoss RA-G high capacity valves are |
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manufactured to the highest standards, and |
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are approved to the European Standard EN |
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215. |
The RA-G valves are fitted with a grey protective cap. This protective cap must not be used as a manual shut off device. A special manual shut off device is available (code no. 013G3300).
The pressure pin in 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 the system.
In order to avoid depositions and corrosion the composition of the hot water must be in accordance with the VDI 2035 Guidelines.
It is recommended that formulations containing mineral oil are avoided.
Systems
1. One-pipe system, flow from top |
2. One-pipe system, flow from bottom |
3. Zone control application. Thermal actuator TWA 4. Danfoss Renovation+ with AB-QM and AB-QT in combination with room thermostat/program-
mer.
VDSXR102 |
© Danfoss |
11/2010 |
1 |
Data Sheet |
High capacity valve body, type RA-G |
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Ordering |
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Max. pressure |
Max |
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Connection |
kv-values [m3/h] P-Band [K] 1)2) |
flow |
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Type |
Design |
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[bar] |
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Code no. |
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temp. |
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In |
Out |
0.5 |
1.0 |
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1.5 |
2.0 |
kvs |
Work. |
Diff.3) |
Test |
°C |
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RA-G 15 |
Angle |
Rp ½ |
R ½ |
0.54 |
1.07 |
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1.61 |
2.06 |
4.30 |
16 |
0.20 |
25 |
120 |
013G1676 |
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Straight |
Rp ½ |
R ½ |
0.51 |
0.94 |
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1.35 |
1.63 |
2.30 |
16 |
0.20 |
25 |
120 |
013G1675 |
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RA-G 20 |
Angle |
Rp 3/4 |
R 3/4 |
0.57 |
1.11 |
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1.16 |
2.20 |
5.01 |
16 |
0.20 |
25 |
120 |
013G1678 |
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Straight |
Rp 3/4 |
R 3/4 |
0.54 |
1.07 |
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1.61 |
2.06 |
3.81 |
16 |
0.20 |
25 |
120 |
013G1677 |
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RA-G 25 |
Angle |
Rp 1 |
R 1 |
0.59 |
1.27 |
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1.77 |
2.41 |
5.50 |
16 |
0.16 |
25 |
120 |
013G1680 |
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Straight |
Rp 1 |
R 1 |
0.57 |
1.16 |
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1.71 |
2.27 |
4.58 |
16 |
0.16 |
25 |
120 |
013G1679 |
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Accessories
1)The kv-value indicates the water flow (Q) in m3/h at a pressure drop (∆p) across the valve of 1 bar. kv = V : √∆p. The kvs-values state the flow (Q) at a maximum lift, i.e. at fully open valve.
2)If a RAW/RAS-C/RAS-C2/RAS-D/RAX/RAE sensor or a remote sensor is used the P-band is extended by a factor 1.6.
3)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.
Product |
Size |
Code no. |
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Gland seal, 10 pcs. 1) |
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013G0290 |
RTD-CB back-flow restrictor 2) |
DN 15 |
013L1925 |
RTD-CB back-flow restrictor 2) |
DN 20 |
013L1926 |
RTD-CB back-flow restrictor 2) |
DN 25 |
013L1927 |
RTD-BR bypass restrictor 2) |
DN 15/10 |
013L1915 |
RTD-BR bypass restrictor 2) |
DN 20/15 |
013L1916 |
Service insert 3) |
DN 15/20 |
013G1706 |
Service insert 3) |
DN 25 |
013G1707 |
1)The gland seal may be replaced with the heating system in operation.
2)To avoid unintended heat emission from the radiator, it is recommended to install a flow restrictor, see further details on flow restrictors in separate data sheet.
3)Service inserts can only be replaced without water on the system.
2 |
VDSXR102 |
© Danfoss |
11/2010 |
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