Danfoss AVTA Water Valve
Danfoss AVTA Thermostatically Self-acting cooling water valve
AVTA is a self-acting, thermostatic valves for use in cooling applications. The valve is commonly used in connection with hydraulic stations, and is often named the "fit and forget" valve, due to its immense reliability, proven throughout decades.
- Self-acting cooling water valves for accurate flow control based on sensor temperature
- Capillary sensor with adsorption charge, mass charge or universal charge
- Open on rising temperature
- Brass or stainless steel valve body
- For extremely aggressive media, also available in titanium (please contact us)
- Click for the Danfoss AVTA Technical PDF Brochure
Technical Data
| Media temperature : |
-25 to + 130oC |
| Differential pressure : |
0 to 10 bar |
| Max. working pressure : |
16 bar |
| Max. test pressure : |
25 bar |
| Max. pressure on sensor : |
25 bar |
| Materials : |
Standard valve body : Brass |
| |
Stainless steel or DZR bodies on request |
Opens on rising sensor temperature. The valve is pressure relieved, i.e. the degree of opening is not effected by differential pressure Δp (pressure drop). The regulation range is defined for the point at which the valve begins to open.
AVTA with adsorption charge
The charge consists of active carbon and CO2 which is absorbed on falling sensor temperature and thereby produce pressure changes in the element.
Special Characteristics:
- Wide regulating range
- Small sensor dimensions - ø9.5 x 160mm. The sensor can be installed in any position as far as orientation and temperature is concerned.
| Connection |
Regulating range
(oC) |
Max. sensor temperature |
kv Value (m3/h at Δp = 1bar) |
Capillary tube length |
Type |
Code No. |
Weight |
| G 1/2 |
+10 to +80oC |
+130oC |
1.9 |
2.3 |
AVTA15 |
003N0107 |
1.53 |
| G 3/4 |
+10 to +80oC |
+130oC |
3.4 |
2.3 |
AVTA20 |
003N0108 |
1.42 |
| G 1 |
+10 to +80oC |
+130oC |
5.5 |
2.3 |
AVTA25 |
003N0109 |
1.57 |
AVTA with universal charge
The charge is liquid / gas where the liquid surface (regulating point) is always inside the sensor. Which charge medium is used depends on the temperature range.
Special Characteristics
- Sensor Dimensions ø18 x 210mm. The sensor must be installed horizontally or with the free end pointing downwards. The sensor can be installed colder or warmer than the valve.
- Max pressure on sensor 25 bar
| Connection |
Regulating range
(oC) |
Max. sensor temperature |
kv Value (m3/h at Δp = 1bar) |
Capillary tube length |
Type |
Code No. |
Weight |
| G 1/2 |
0 to +30oC |
+57oC |
1.9 |
2 |
AVTA15 |
003N2132 |
1.68 |
| G 3/4 |
0 to +30oC |
+57oC |
3.4 |
2 |
AVTA20 |
003N3132 |
1.50 |
| G 1/2 |
+25 to +65oC |
+90oC |
1.9 |
2 |
AVTA15 |
003N2162 |
1.68 |
| G 3/4 |
+25 to +65oC |
+90oC |
3.4 |
2 |
AVTA20 |
003N3162 |
1.70 |
| G1 |
+25 to +65oC |
+90oC |
5.5 |
2 |
AVTA25 |
003N4162 |
1.83 |
AVTA Accessories
Sensor pocket for ø9.5mm - Brass G 1/2 - 017-4367 - £16.15 |
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