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Datasheet generated 2026-10-07
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Danfoss AVTB Self-Acting Temperature Controller DN 20 20–60 °C NPT 3/4

Danfoss · HVAC & Refrigeration · Water Regulating Valves · Denmark · danfoss.com
Part Number
003N7252  ·  HS 8481.80
Danfoss AVTB Self-Acting Temperature Controller DN 20 20–60 °C NPT 3/4

Danfoss AVTB self-acting thermostatic temperature controller, OEM P/N 003N7252. A proportional, self-acting (no external power) valve that throttles the flow to hold a set medium temperature: the liquid-charged sensor closes the valve on rising temperature. Valve size DN 20. Kvs 3.4 m³/h. Temperature setting range 20 °C – 60 °C. Connection NPT 3/4. PN 16. Body Brass CuZn40Pb2 W. no 2.0402. OEM designation "AVTB 20 Thermostatic valve 20-60 °C". OEM P/N 003N7252. EAN 5715255156185. Technical data quoted verbatim from store.danfoss.com (code 003N7252).

Technical Specifications

BrandDanfoss
Part number003N7252
ModelAVTB (fast)
CategoryHVAC & Refrigeration — Water Regulating Valves
FunctionSelf-acting thermostatic temperature controller
Valve sizeDN 20
Valve diameter20 mm
Temperature setting range20 °C – 60 °C
Kvs value3.4 m³/h
Connection sizeNPT 3/4
Connection typeInternal thread
Sensor connectionM14x1 / R1/2 ext thread acc. DIN 2999
Temperature sensor length180 mm
Temperature sensor diameter9.5 mm
Capillary tube length2 m
Max differential pressure10 bar
Flow characteristicLinear
Cone/seat sealing materialNBR / Brass W. No 2.0402
Valve body materialBrass CuZn40Pb2 W. no 2.0402
Valve seat materialCr Ni steel W.no 1.4301
Temperature sensor materialCopper mat. No 2.0090
Approval standardETA VA 1.54/18952
MediaDistrict heating/cooling circulation water
Medium temperature range2 °C to 130 °C
Body materialBrass CuZn40Pb2 W. no 2.0402
ApprovalsApproval standard ETA VA 1.54/18952
REACH Candidate List substanceLead (CAS no. 7439-92-1)
Volume4.082 L
Net weight1.634 kg
Gross weight1.72 kg
OEM descriptionAVTB 20 Thermostatic valve 20-60 °C
EAN5715255156185
HS code8481.80

Properties

MaterialBrass CuZn40Pb2 W. no 2.0402
Pressure ratingPN 16; max differential pressure 10 bar
Temperature range2 °C to 130 °C (media); setting range 20 °C–60 °C
Standard sizeAVTB (fast)
MOQ1

Compatibility

Fit in the flow line with the sensor in the medium to be controlled; the AVTB closes on rising temperature. Match valve size (DN 20), Kvs (3.4 m³/h) and temperature setting range to the application before ordering. Self-acting — no external power or actuator required. Confirm code and range before ordering.

Attached Documents