Danfoss RTD-CB, RTD-BR Data sheet
Data Sheet
Flow Restrictors for One-Pipe Systems
Application
RTD-CB back-flow restrictor |
RTD-BR bypass restrictor |
Principle
Heat Transfer
The RTD-CB back-flow restrictor prevents radiator back-flow and heat transfer at the return pipe in a one-pipe system.
The back-flow restrictor is installed in the radiator return pipe with the bow pointing upwards.
Radiator
The RTD-BR bypass restrictor decreases flow through the bypass in a one-pipe system, thus forcing the correct amount of system water to pass through the radiator.
The bypass restrictor will decrease the bypass with one dimension ( e.g. DN 20 > DN 15).
The bypass restrictor is installed in the bypass by the radiator.
Convector
90 ˚C |
90 ˚C |
TRV |
TRV |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1 |
|
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
RTD-BR |
|
|
|
|
|
|
|
|
|
|
RTD-BR |
|
|
|
|
|
RTD-CB |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||
|
|
|
MIN. 175 MM |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
MIN. 175 MM |
|
|
|
|
|
|
|
|
|
||||||||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
RTD-CB |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||
1. Heat cost allocator (the heat cost allocator is placed according to the manufacturer’s instructions.)
The RTD-CB back-flow restrictor reduces heat transfer from system pipes to radiator, when the TRV is closed.
With the bypass placed 175 mm from the radiator, a flow temperature of 90 ˚C and a room temperature of 20 ˚C, the max. detected temperature is:
Heat cost allocators with a single |
28 ˚C |
|
sensor for radiator surface |
||
|
||
|
|
|
Heat cost allocators with two |
room temp. |
|
sensors for radiator surface / room |
||
+ 5 °C |
||
temperature |
||
|
||
|
|
Danfoss Heating Solutions |
VDCHA202 |
© Danfoss |
02/2011 |
1 |
Data Sheet |
Flow Restrictors for One-Pipe Systems |
|
|
|
|
|
|
|||
Data and Ordering |
|
|
|
Connections |
Kvs |
Max. |
Test |
Max. |
|
|
|
Type |
Size |
|
|
|
work. |
work. |
Code no. |
||
|
|
Inlet |
Outlet |
press. |
||||||
|
|
|
|
|
press. |
temp. |
|
|||
|
|
|
|
|
|
|
|
|
||
|
RTD-CB back-flow |
DN 15 |
|
R 1/2 |
Rp 1/2 |
4.54 m³/h |
10 bar |
16 bar |
120 °C |
013L1925 |
|
restrictor |
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
RTD-CB back-flow |
DN 20 |
|
R 3/4 |
Rp 3/4 |
8.06 m³/h |
10 bar |
16 bar |
120 °C |
013L1926 |
|
restrictor |
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
RTD-CB back-flow |
DN 25 |
|
R 1 |
Rp 1 |
17.0 m³/h |
10 bar |
16 bar |
120 °C |
013L1927 |
|
restrictor |
|
||||||||
|
|
|
|
|
|
|
|
|
|
|
|
RTD-BR bypass |
DN 15/10 |
G 1/2 |
G 1/2 |
6.80 m³/h |
10 bar |
16 bar |
120 °C |
013L1915 |
|
|
restrictor |
|||||||||
|
|
|
|
|
|
|
|
|
|
|
|
RTD-BR bypass |
DN 20/15 |
G 3/4 |
G 3/4 |
15.1 m³/h |
10 bar |
16 bar |
120 °C |
013L1916 |
|
|
restrictor |
|||||||||
|
|
|
|
|
|
|
|
|
|
|
Dimensions |
Back-flow restrictor |
|
|
|
|
|
|
|
|
|
|
RTD-CB |
|
|
S1 |
|
|
S2 |
|
|
|
|
|
|
|
<![if ! IE]> <![endif]>L3 |
|
|
|
|
|
|
|
|
|
|
D |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
D2 |
|
|
|
|
|
|
|
L1 |
|
|
|
|
|
|
|
|
|
|
|
L2 |
|
|
|
|
|
|
|
|
Material: Stainless steel, AISI 316 |
|
|
|||
|
Type |
L1 |
L2 |
|
L3 |
D |
d2 |
S1 |
S2 |
Code no. |
|
RTD-CB DN 15 |
69 |
96 |
|
32 |
Rp 1/2 |
R 1/2 |
27 |
30 |
013L1925 |
|
RTD-CB DN 20 |
76 |
106 |
48 |
Rp 3/4 |
R 3/4 |
32 |
37 |
013L1926 |
|
|
RTD-CB DN 25 |
90 |
126 |
48 |
Rp 1 |
R 1 |
41 |
46 |
013L1927 |
|
Bypass restrictor RTD-BR
S1 |
S2 |
<![if ! IE]> <![endif]>D1 |
<![if ! IE]> <![endif]>D4 |
<![if ! IE]> <![endif]>D2 |
<![if ! IE]> <![endif]>D3 |
|
|||||
|
|
|
|
L2 |
|
|
|
|
|
L1 |
|
|
|
|
|
L3 |
|
Material: Black steel, ASTM A 216 WCB
Type |
L1 |
L2 |
L3 |
D1 |
D2 |
D3 |
D4 |
S1 |
S2 |
Code no. |
RTD-BR DN 15/10 |
27.3 |
24 |
47.5 |
G 1/2 |
G 1/2 |
G 1 |
Ø11 |
26 |
40 |
013L1915 |
|
|
|
|
|
|
|
|
|
|
|
RTD-BR DN 20/15 |
32 |
25.5 |
51.5 |
G 3/4 |
G 3/4 |
G 5/4 |
Ø16 |
32 |
50 |
013L1916 |
|
|
|
|
|
|
|
|
|
|
|
2 |
VDCHA202 |
© Danfoss |
02/2011 |
Danfoss Heating Solutions |
Loading...