Danfoss thermostatic element, genuine OEM spare code 003N0077, for AVTA / AVTB (and FJVA / FJV) self-acting temperature-regulating valves. Hermetically sealed universal-charge unit comprising sensor, capillary and bellows; it converts a rising medium temperature into the force that opens the valve — no external power needed. Regulating range 0–30 °C (AVTA / FJVA). Sensor 18 x 210 mm, capillary 5000 mm, max. sensor temperature 57 °C. Replaces a worn or wrongly-ranged element without changing the valve body. EAN 5702423006878.
| Brand | Danfoss |
| Part number | 003N0077 |
| Type | Thermostatic element — spare part for AVTA / AVTB (and FJVA / FJV) self-acting valves |
| Category | HVAC & Refrigeration — Water Regulating Valves |
| Function | Hermetically sealed sensor + bellows charge unit; drives the valve on rising temperature |
| Charge type | Universal |
| Regulating range (AVTA / FJVA) | 0–30 °C |
| Sensor | 18 x 210 mm |
| Capillary tube length | 5000 mm |
| Max. sensor temperature | 57 °C |
| Net weight | 0.113 kg |
| EAN | 5702423006878 |
| Compliance | China RoHS; EU RoHS out of scope |
| HS code | 8481.90 (parts of taps, cocks, valves) |
| Compatible with | AVTA / AVTB — Universal Charge 0–30 °C |
| Product group | Water valves spare parts |
| Cap. tube length fraction [in] | 196 3/4 in |
| Capillary tube length [mm] | 5000 mm |
| China RoHS compliance | Yes |
| EU RoHS compliance | Out of scope |
| Max. sensor temperature [°C] | 57 °C |
| Max. sensor temperature [°F] | 134.6 °F |
| REACH Candidate List substances | Lead (CAS no. 7439-92-1) |
| Sensor size (Ø x L) [in] | 23/32 x 8 1/4 in |
| Sensor size (Ø x L) [mm] | 18 x 210 mm |
| Temp. range AVTA/FJVA [°C] [max] | 30 °C |
| Temp. range AVTA/FJVA [°C] [min] | 0 °C |
| Temp. range AVTA/FJVA [°F] [max] | 86 °F |
| Temp. range AVTA/FJVA [°F] [min] | 32 °F |
| Temp. range AVTB/FJV [°C] [max] | 30 °C |
| Temp. range AVTB/FJV [°C] [min] | 0 °C |
| Temp. range AVTB/FJV [°F] [max] | 86 °F |
| Temp. range AVTB/FJV [°F] [min] | 32 °F |
| Type designation | Thermostatic element |
| Used for product | AVTA |
| Material | Copper / brass sensor, steel bellows |
| Pressure rating | Max. sensor pressure 25 bar (365 psi) |
| Temperature range | Regulating range 0–30 °C; max. sensor 57 °C |
| Standard size | AVTA, AVTB |
| MOQ | 1 |
Fits AVTA and AVTB (also FJVA / FJV) valve bodies. Match the charge type (Universal) and regulating range (0–30 °C) to the original element; Mass-charge elements require the sensor to sit above the valve.