cBallast
Industrial Parts Catalog
Datasheet generated 2026-10-07
sales@cballast.com
cballast.com

Danfoss AVTB Self-Acting Temperature Controller DN 25 30–100 °C Rp 1 003N8146

Danfoss · HVAC & Refrigeration · Water Regulating Valves · Denmark · danfoss.com
Part Number
003N8146  ·  HS 8481.80
Danfoss AVTB Self-Acting Temperature Controller DN 25 30–100 °C Rp 1 003N8146

Danfoss AVTB self-acting thermostatic temperature controller, OEM P/N 003N8146. 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 25. Kvs 5.5 m³/h. Temperature setting range 30 °C – 100 °C. Connection Rp 1 (ISO 7/1). PN 16. Body Brass CuZn40Pb2 W. no 2.0402. OEM designation "AVTB PN16 25/5,5 30-100 2,3m intRp fl/re". OEM P/N 003N8146. EAN 5702421100783. Technical data quoted verbatim from store.danfoss.com (code 003N8146).

Technical Specifications

BrandDanfoss
Part number003N8146
ModelAVTB
CategoryHVAC & Refrigeration — Water Regulating Valves
FunctionSelf-acting thermostatic temperature controller
Valve sizeDN 25
Valve diameter25 mm
Temperature setting range30 °C – 100 °C
Kvs value5.5 m³/h
Connection sizeRp 1
Connection typeInternal thread
Connection standardISO 7/1
Sensor connectionM14x1 / R1/2 ext thread acc. DIN 2999
Temperature sensor length150 mm
Temperature sensor diameter9.5 mm
Capillary tube length2.3 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 weight1.478 kg
Gross weight1.73 kg
OEM descriptionAVTB PN16 25/5,5 30-100 2,3m intRp fl/re
EAN5702421100783
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 30 °C–100 °C
Standard sizeAVTB
Thread standardISO 7/1
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 25), Kvs (5.5 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.

Standards

Attached Documents