Data Sheet
RLV-KDV H-Piece for valve radiators - blockable and drainable, with integrated differential pressure control
Application
RLV-KDV is a Dynamic H-piece designed for radiators with integrated valves (valve radiators) in 2-pipe systems. RLV-KDV combines the following functions:
•Integrated differential pressure controller using membrane technology.
•Constant pressure over the radiator and valve in full and partial load.
•Self-balancing to optimal pressure conditions once the flow presetting on the integrated radiator-valve is done.
•Lockshield on supply and return.
•Filling and draining possibility (with fill and drain tap 003L0152).
•Self sealing connection pieces to the radiator for G ½ internal thread and G ¾ external thread.
The flow adjustment presetting is done on the radiator valve. As a result the heating system is self balancing to the preset volume in the
integrated valve and working on optimal conditions in full and partial demand.
This results in lowered return temperature, energy saving and preventing claims due to noise in the radiator.
Self sealing connection pieces ensure that RLV-KDV can be used both for radiators with an internal thread of G ½ and with an external thread of G ¾ A.
A fill and drain tap is available as an accessory. Connection to copper, soft steel, PEX and Alupex pipes is made with Danfoss compression fittings. See separate datasheet.
In order to avoid deposition and corrosion, the composition of the hot water should be in accordance with the VDI 2035 guideline (Verein Deutscher Ingenieure).
System |
Two-pipe system with valve radiators, typical connection types. |
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RLV-KDV |
RLV-KDV |
RLV-KDV |
RLV-KDV |
Straight Left |
Straight Right |
angle Right |
angle Left |
Ordering and data
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Connection |
Max. |
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Max. |
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Test |
p min/ |
Code no. |
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Type |
Version |
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operation |
water |
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Radiator |
System |
pressure |
p max |
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pressure |
temp. |
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Straight R & L |
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013G7870 |
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RLV-KDV |
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Angle Right |
G ½ |
G ¾ A |
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013G7871 |
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with |
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Angle Left |
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013G7872 |
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constant |
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10 bar |
16 bar |
95 ˚C |
0.15 bar / |
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differential |
Straight R & L |
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0.60 bar |
013G7873 |
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pressure |
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Angle Right |
G ¾ |
G ¾ A |
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013G7874 |
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control |
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Angle Left |
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013G7875 |
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© Danfoss Climate Solutions | 2021.06 | AI325141533218en-000102 |
1 |
Data Sheet |
RLV-KDV H-Piece for valve radiators with integrated differential pressure control |
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Capacities |
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RA-N |
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Presetting |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
N |
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No Sensor |
Max. (l/h) |
43 |
55 |
71 |
85 |
117 |
139 |
148 |
159 |
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Gas Sensor |
Xp1 |
35 |
50 |
65 |
75 |
95 |
105 |
115 |
125 |
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Xp2 |
35 |
50 |
65 |
75 |
110 |
120 |
135 |
150 |
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Valve-kv* |
0.088 |
0.131 |
0.163 |
0.200 |
0.288 |
0.369 |
0.456 |
0.544 |
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Liquid Sensor |
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Xp1 |
28 |
40 |
50 |
55 |
70 |
75 |
80 |
85 |
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Xp2 |
35 |
50 |
65 |
75 |
95 |
105 |
120 |
130 |
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* kv-value used for presetting of non-Danfoss integrated valves in radiators
(Capacities comply to all radiators inside a -+ 10% span depending on the radiator type and size.)
2 © Danfoss Climate Solutions | 2021.06 | AI325141533218en-000102