Danfoss RLV-KDV Data sheet
Data Sheet
RLV-KDV H-Piece for valve radiators - blockable and
drainable, with integrated differential pressure control
Application
System
RLV-KDV is a Dynamic H-piece designed for
radiators with integrated valves (valve radiators)
integrated valve and working on optimal
conditions in full and partial demand.
in 2-pipe systems. RLV-KDV combines the
following functions:
• Integrated differential pressure controller using
membrane technology.
This results in lowered return temperature,
energy saving and preventing claims due to noise
in the radiator.
• 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.
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.
• 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
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).
Two-pipe system with valve radiators, typical connection types.
RLV-KD V
Straight Left
RLV-KD V
Straight Right
RLV-KD V
angle Right
RLV-KD V
angle Left
Ordering and data
Type Version
Straight R & L
RLV-KDV
with
constant
differential
pressure
control
Angle Right
Angle Left
Straight R & L
Angle Right
Angle Left
Connection
Radiator System
G ½ G ¾ A
G ¾ G ¾ A
© Danfoss Climate Solutions | 2021.06 | AI325141533218en-000102
Max.
operation
pressure
10 bar 16 bar 95 ˚C
Test
pressure
Max.
water
temp.
p min/
p max
0.15 bar /
0.60 bar
Code no.
013G7870
013G7871
013G7872
013G7873
013G7874
013G7875
1
Data Sheet RLV-KDV H-Piece for valve radiators with integrated differential pressure control
Capacities
RA-N
Presetting 1 2 3 4 5 6 7 N
No Sensor Max. (l/h) 43 55 71 85 117 139 148 159
Gas Sensor
Liquid Sensor
* kv-value used for presetting of non-Danfoss integrated valves in radiators
Xp1 35 50 65 75 95 105 115 125
Xp2 35 50 65 75 110 120 135 150
Valve-kv* 0.088 0.131 0.163 0.200 0.288 0.369 0.456 0.544
Xp1 28 40 50 55 70 75 80 85
Xp2 35 50 65 75 95 105 120 130
(Capacities comply to all radiators inside a -+ 10% span depending on the radiator type and size.)
2
© Danfoss Climate Solutions | 2021.06 | AI325141533218en-000102
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