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Datasheet generated 2026-10-08
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Danfoss AVTQ Self-Acting Temperature Controller DN 15, 45–60 °C, PN 16 (003L3525)

Danfoss · HVAC & Refrigeration · Balancing Valves · Denmark · danfoss.com
Part Number
003L3525  ·  HS 8481.80
Danfoss AVTQ Self-Acting Temperature Controller DN 15, 45–60 °C, PN 16 (003L3525)

Danfoss AVTQ (balancing valves), OEM order code 003L3525. Self-acting proportional temperature controller (main valve, pilot ordered separately) for domestic-hot-water and district-heating temperature regulation. Manufacturer description: AVTQ Main contr. DN15 excl.pilot c., I-p. connection/size DN 15, Kvs 1.6 m³/h, PN 16; max. differential pressure 6 bar, media/setting temperature 2 °C to 100 °C, body material Rg5 W. Specifications quoted verbatim from store.danfoss.com (code 003L3525). Used in commercial refrigeration, provision-room cooling and reefer plant rooms across HFC, HFO and CO2 (R744) refrigerants. no 2.1096.01; Standard size: DN 15; Pressure rating: PN 16; max. differential pressure 6 bar; Temperature range: 2 °C to 100 °C; HS code: 8481.80.

Technical Specifications

BrandDanfoss
Part number003L3525
Code number003L3525
TypeAVTQ
Product groupTemperature controllers
DescriptionAVTQ Main contr. DN15 excl.pilot c., I-p
Gross weight2.9 Kilogram
Net weight2.9 Kilogram
Ambient temperature [°C] [max]70 °C
Ambient temperature [°C] [min]0 °C
Capillary tube length [m]1 m
Cavitation factor0.6
Cone /seat sealing materialEPDM / Stainless steel 1.4571
Connection sizeG 3/4 A
Connection standardISO 228/1
Connection typesExternal Thread
Control ratio100:1
Diameter [mm]15 mm
Differential pressure range [bar] [Max]6 bar
Flow characteristicSplit
FunctionFlow compensated temp. controller
Function VSP - PNo
Function VSP - QNo
Function VSP - TNo
Impulse tube materialCopper mat. No 2.0090
Kvs values [m³/h]1.6 m³/h
Leakage rate [% Kvs]< 0.05
Media pH [Max]10
Media pH [Min]7
Media temperature [°C] [Max]100 °C
Media temperature [°C] [Min]2 °C
Media temperature at sensor [°C] [Max]130 °C
Medium alternativeGlycolic water up to 30%
Medium alternative 2 DHWDomestic hot water (clorine (cl) content max. 200 PPM)
Number of ports2
Permissible mediaDistrict heating/cooling circulation water
Pressure classPN 16
Pressure nominal [bar]16 bar
Rection time close [sec]4 "
Rection time open [sec]4 "
Sensor connectionM22x1 / R3/4 ext thread acc. DIN 2999
Temperature sensor diameter [mm]15 mm
Temperature sensor length [mm]90 mm
Temperature sensor materialCopper mat. No 2.0090
Temperature setting range [°C] [Max]60 °C
Temperature setting range [°C] [Min]45 °C
Transport temperature [°C] [Max]50 °C
Transport temperature [°C] [Min]-20 °C
Valve body materialRg5 W. no 2.1096.01
Valve cone materialEPDM rubber
Valve seat materialCrNi steel W. No 1.4404
Valve sizeDN 15
HS code8481.80 (taps, cocks, valves for pipes)

Properties

MaterialRg5 W. no 2.1096.01
Pressure ratingPN 16; max. differential pressure 6 bar
Temperature range2 °C to 100 °C
Standard sizeDN 15
MOQ1

Compatibility

Genuine Danfoss part, order code 003L3525 (Temperature controllers). Confirm the code, size (DN 15) and matching valve/actuator family against your Danfoss datasheet before ordering.

Attached Documents