Danfoss AVDA, AVDSA Data sheet [nl]
Data sheet
Di erential pressure relief controller
AVDA - internal thread, PN 10
AVDSA - internal thread, PN 16
Description
AVDA AVDSA
AVDA and AVDSA are self-acting temperature controllers used for constant flow control or bypass control. Controller opens on rising di erential pressure.
The controller has a control valve, an actuator with one control diaphragm and handle for di erential pressure setting.
For apartment block heating, district heating plant and central heating systems.
Main data:
•DN 15, 20, 25
•kvs 1.9, 3.4, 5.5
•PN 10, 16
•Setting range:
0.1- 1.2 bar (AVDA)
0.05- 0.5 bar (AVDSA)
•Temperature:
- Circulation water / glycolic water up to 30%: 2 … 130 °C
•Connections: Int. thread
Ordering
Example:
Di erentialpressurerelief controller,DN15,kvs 1.9,PN16, settingrange0.05-0.5,tmax 130°C, int.thread
- 1x AVDSADN15controller
CodeNo:003N8204
AVDA, AVDSA Controller
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kvs |
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Setting range |
Connection |
Connection |
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Picture |
Type |
DN |
PN |
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- valve |
Code No.1) |
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Int. thread |
Impulse |
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m3/h |
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bar |
tube flare |
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ISO 7/1 |
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15 |
1.9 |
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Rp ½ |
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003N0038 |
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AVDA |
20 |
3.4 |
10 |
0.1 - 1.2 |
Rp ¾ |
7/16-20 UNF |
003N0039 |
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25 |
5.5 |
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Rp 1 |
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003N0040 |
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15 |
1.9 |
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Rp ½ |
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003N82042) |
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AVDSA |
20 |
3.4 |
16 |
0.05 - 0.5 |
Rp ¾ |
7/16-20 UNF |
003N82052) |
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25 |
5.5 |
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Rp 1 |
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003N8206 |
1)Thecodeno.includes2impulsetubes(0.5and1.5m)withtailpieces.
2)Availableonrequest
Service kits
Picture |
Type designation |
for |
Code No. |
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Repairset |
DN 15 |
003N4006 |
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Two diaphragms, two O-rings, one rubber cone, |
DN 20 |
003N4007 |
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one tube of grease and eight valve cover screws |
DN 25 |
003N4008 |
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Brass-dipped nipple (two supplied as standard) |
AVDA, AVDSA |
631X4700 |
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Valve stu ng box |
AVDA, AVDSA |
065F0006 |
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Diaphragm housing |
AVDA |
003N0065 |
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AVDSA |
003N0284 |
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DH-SMT/SI |
VD.55.B1.02 © Danfoss 08/2006 |
1 |
Data sheet |
Di erential pressure relief controllers AVDA (PN 10) and AVDSA (PN 16) |
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Technical data |
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Nominal diameter |
DN |
15 |
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20 |
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25 |
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kvs value |
m3/h |
1.9 |
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3.4 |
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5.5 |
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Nominal pressure |
PN |
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AVDA: 10, AVDSA: 16 |
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Max. di erential pressure |
bar |
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7 |
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Medium |
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Circulation water / glycolic water up to 30% |
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Medium pH |
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Min. 7, max. 10 |
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Medium temperature |
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2 … 130 oC |
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Materials |
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Valve body |
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MS 58, hot-pressed, DIN 17660, W.No. 2.0402, CuZn40Pb2 |
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Valve seat |
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Cr Ni steel, DIN 17660, W.No. 1.4301 |
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Valve cone |
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NBR-rubber |
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Spindle |
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Dezincing-free brass, BS 2874/CZ132 |
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Diaphragm housing |
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Zinc-cromated steel, DIN 1624, W.No. 1.0338 |
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Diaphragm |
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EPDM-rubber |
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Application principles
Installation positions |
The valve body can be installed in any position. |
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A Danfoss FV strainer is recommended. |
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Impulse tubes have to be installed vertically |
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or horizontally onto the main pipe, never |
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downwards. |
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Needle valve can be installed between main pipe |
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and impulse tube, if necessary. |
(+) impulse tube has to be connected to flow line, (-) impulse tube has to be connected to return line. Setting can be simplified by using pressure indicators (manometers) placed close to impulse tube connections.
By turning diaphragm housing downwards the letter “RA” on valve housing must be oriented upright.
Design
1.Handle for di erential pressure setting
2.Spring housing
3.Setting spring
4.Spring guide
5.Diaphragm
6.Valve cone
7.Spindle
8.O-ring
9.O-ring gland
10. Diaphragm housing
11. Control diaphragm
12. Nipple for impulse tube
13. Lead seal
AVDA |
AVDSA |
2 |
VD.55.B1.02 © Danfoss 08/2006 |
DH-SMT/SI |
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