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Datasheet generated 2026-10-08
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Danfoss Thermostatic Element for AVTA / AVTB — Adsorption Charge 30–100 °C — Spare Part

Danfoss · HVAC & Refrigeration · Water Regulating Valves · Denmark · danfoss.com
Part Number
003N0278  ·  HS 8481.90
Danfoss Thermostatic Element for AVTA / AVTB — Adsorption Charge 30–100 °C — Spare Part

Danfoss genuine spare part, OEM code 003N0278. Hermetically sealed thermostatic element (sensor, bellows and charge) for AVTA and AVTB thermostatically operated water valves. Adsorption charge, regulating range 30–100 °C, sensor 9.5 x 150 mm, capillary tube 2300 mm. Replaces the element on an installed AVTA/AVTB valve without changing the valve body or setting section. Adsorption charge — sensor can be installed in any position; regulating point independent of sensor orientation. EAN 5702423007219.

Technical Specifications

BrandDanfoss
Part number003N0278
TypeGenuine spare part — Thermostatic element
CategoryHVAC & Refrigeration — Water Regulating Valves
Fits valve(s)AVTA, AVTB
Charge typeAdsorption
Regulating range30–100 °C
Sensor9.5 x 150 mm
Capillary tube length2300 mm
Max. pressure on sensor25 bar (365 psi)
Net weight0.245 kg
EAN5702423007219
HS code8481.90 (valve parts)
Compatible withAVTA / AVTB — Adsorption Charge 30–100 °C
Product groupWater valves spare parts
Cap. tube length fraction [in]90 9/16 in
Capillary tube length [mm]2300 mm
China RoHS complianceOut of scope
EU RoHS complianceOut of scope
Max. sensor temperature [°C]130 °C
Max. sensor temperature [°F]266 °F
REACH Candidate List substancesLead (CAS no. 7439-92-1)
Sensor size (Ø x L) [in]3/8 x 5 29/32 in
Sensor size (Ø x L) [mm]9.5 x 150 mm
Temp. range AVTA/FJVA [°C] [max]80 °C
Temp. range AVTA/FJVA [°C] [min]10 °C
Temp. range AVTA/FJVA [°F] [max]176 °F
Temp. range AVTA/FJVA [°F] [min]50 °F
Temp. range AVTB/FJV [°C] [max]100 °C
Temp. range AVTB/FJV [°C] [min]30 °C
Temp. range AVTB/FJV [°F] [max]212 °F
Temp. range AVTB/FJV [°F] [min]86 °F
Type designationThermostatic element
Used for productAVTA

Properties

Temperature rangeRegulating range 30–100 °C
Standard sizeAVTA, AVTB
MOQ1

Compatibility

Confirm the required charge type (Adsorption) and regulating range (30–100 °C) before ordering — the element determines the valve's temperature range. Install per the AVTA/AVTB service instructions.

Attached Documents