Danfoss AVTB (fast) DN 25 Self-Acting Temperature Controller 20 °C – 60 °C

Part Number
003N8253 · HS 8481.80

Danfoss AVTB (fast) self-acting temperature controller, OEM P/N 003N8253, DN 25, PN 16. Proportional self-acting valve that throttles flow to hold a temperature set point without external power; the charged sensor and 2 m capillary act directly on the valve cone. The "fast" version reacts within about 3 seconds for tight control. Setting range 20 °C – 60 °C; Kvs 5.5 m³/h; connection Rp 1 (internal thread, ISO 7/1); brass body CuZn40Pb2; linear flow characteristic; return mounting. Media: district heating/cooling circulation water (pH 7–10). Approved to ETA VA 1.54/18952.

Technical Specifications

Brand

Danfoss

Part number

003N8253

Type designation

AVTB (fast) PN 16, DN 25, 5.5 m³/h, 20 °C – 60 °C, 2 m, internal thread

Brand	Danfoss
Part number	003N8253
Type designation	AVTB (fast) PN 16, DN 25, 5.5 m³/h, 20 °C – 60 °C, 2 m, internal thread
Category	HVAC & Refrigeration — Water Regulating Valves
Function	self-acting proportional temperature controller (throttles on rising temperature)
Nominal size	DN 25
Pressure class	PN 16
Kvs	5.5 m³/h
Temperature setting range	20 °C – 60 °C
Connection	Rp 1 (internal thread, ISO 7/1)
Capillary tube length	2 m
Temperature sensor	Copper, mat. no. 2.0090
Flow characteristic	Linear
Mounting version	Return
Body material	Brass CuZn40Pb2 (W.-no. 2.0402)
Valve cone / seat	NBR / brass
Media	District heating / cooling circulation water (pH 7–10)
Ambient temperature range	0 °C to 70 °C
EAN	5702421100912
Approvals	ETA VA 1.54/18952; EAC, PED, EU RoHS, China RoHS

Material	Body brass CuZn40Pb2 (W.-no. 2.0402); cone/seat NBR / brass; sensor Copper, mat. no. 2.0090
Pressure rating	PN 16
Temperature range	20 °C – 60 °C setting range
Standard size	DN 25
Thread standard	ISO 7/1
MOQ	1

Danfoss AVTB (fast) DN 25 Self-Acting Temperature Controller 20 °C – 60 °C

Technical Specifications

Properties

Compatibility

Standards

Approvals

Attached Documents