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Danfoss AVTB Thermostatic Valves

Temperature controller AVTB (PN 16)
Danfoss AVTB is self-acting temperature controller used to control the water temperature in hot water tanks, heat exchangers, oil preheaters, etc. Controller closes on rising temperature.
The controller has a control valve, thermostatic actuator and handle for temperature setting. Thermostatic actuator consist of a bellows, capillary tube and sensor.
The complete AVTB valve has a setting knob, a valve body, a bellows element with capillary tube and a sensor pocket. 
The valve is used to control the water temperature in hot-water tanks, heat exchangers, oil preheaters etc.

Danfoss AVTBMain data:
• DN 15, 20, 25
• kVS 1.9, 3.4, 5.5 m3/h
• PN 16
• Setting range: 0…30 °C / 20…60 °C / 30…100 °C
• Temperature:
- Circulation water / glycolic water up to 30%: -25 … +130 °C
• Connections:
- Int. thread
- Ext. thread (weld-on and ext. thread tailpieces)
• Flow or return mounting, depending on sensor type.

Materials of parts in contact with medium:
Valve body - Hot-brass stamping MS58
Diaphragms - Ethylene-propylene rubber
Valve plate - Nitrile rubber 
Valve seat - Chrome steel
Sensor pocket - MS63 brass or 316 stainless steel option

Code No.

DN (mm)

kvs (m3/h)

PN (bar)

tmax (°C)

Connection type

Min. setting temp. (°C)

Max. setting temp.(°C)

Sensor Ømm

003N2232

15

1.9

16

130

Int. thread

0

30

18Ø x 210

003N5101

15

1.9

16

130

Ext. thread

0

30

18Ø x 210

003N5114

15

1.9

16

130

Ext. thread

20

60

9.5Øx180

003N5141

15

1.9

16

130

Ext. thread

30

100

9.5Øx150

003N8141

15

1.9

16

130

Int. thread

30

100

9.5Øx150

003N8229

15

1.9

16

130

Int. thread

20

60

9.5Øx180

003N3232

20

3.4

16

130

Int. thread

0

30

18Ø x 210

003N5102

20

3.4

16

130

Ext. thread

0

30

18Ø x 210

003N5115

20

3.4

16

130

Ext. thread

20

60

9.5Ø  x 180

003N5142

20

3.4

16

130

Ext. thread

30

100

9.5Ø × 150

003N8142

20

3.4

16

130

Int. thread

30

100

9.5Ø × 150

003N8230

20

3.4

16

130

Int. thread

20

60

9.5Ø  x 180

003N4232

25

5.5

16

130

Int. thread

0

30

18Ø x 210

003N5103

25

5.5

16

130

Ext. thread

0

30

18Ø x 210

003N5116

25

5.5

16

130

Ext. thread

20

60

9.5Ø x 180

003N5143

25

5.5

16

130

Ext. thread

30

100

9.5Ø × 150

003N8143

25

5.5

16

130

Int. thread

30

100

9.5Ø x 150

003N8253

25

5.5

16

130

Int. thread

20

60

9.5Ø x 180

Click to View Danfoss AVTB technical 

 

Note:
When selecting a valve always choose the smallest valve which will do the job properly, oversizing may result in poor regulation as well as excessive wear of disc and seat surfaces.

Repair Kit - Consists of:-
Two diaphragms, two O-rings, one rubber cone, one tube of grease and eight cover screws.
Code numbers:
DN 15 -  003N4006
DN 20 -  003N4007
DN 25 -  003N4008

Thermostatic element only:-
Code numbers:
0-30°C sensor 18Øx210 -  003N0075
20-60°C sensor 18Øx210 -  003N0078
20-60°C sensor 9.5Øx180 -  003N0130
30-100°C sensor 9.5Øx180 -  003N0131

Brass pockets for AVTA/B
Sensor 18Øx210 -  003N0050 3/4 bsp 
Sensor 9.5Øx180 -  017-436766 1/2 bsp

Stainless steel pockets for AVTA/B
Sensor 9.5Øx180 -  003N0192 3/4 bsp
Sensor 9.5Øx180 -  003N0196 1/2 bsp

Mounting Bracket for AVTA/B
All - 003N0388