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Datasheet generated 2026-10-08
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Danfoss AHQM Combined Automatic Flow Limiter & Differential-Pressure Controller (PICV) DN 65, PN 16 (003L3604)

Danfoss · HVAC & Refrigeration · Balancing Valves · Denmark · danfoss.com
Part Number
003L3604  ·  HS 8481.80
Danfoss AHQM Combined Automatic Flow Limiter & Differential-Pressure Controller (PICV) DN 65, PN 16 (003L3604)

Danfoss AHQM (balancing valves), OEM order code 003L3604. Self-acting combined automatic flow limiter and differential-pressure controller (pressure-independent control valve) for hydronic balancing of heating and cooling circuits. Manufacturer description: AHQM PN16 65/50/0,3 flange flow/ret. connection/size DN 65, Kvs 50 m³/h, PN 16; max. differential pressure 4 bar, media/setting temperature 2 °C to 120 °C, body material Grey cast iron EN-GJL-250 (GG-25). EAN 5710104028767. HS 8481.80. Specifications quoted verbatim from store.danfoss.com (code 003L3604).

Technical Specifications

BrandDanfoss
Part number003L3604
Code number003L3604
TypeAHQM
Product groupPressure flow controllers
DescriptionAHQM PN16 65/50/0,3 flange flow/ret
Gross weight36 Kilogram
Net weight36 Kilogram
Actuator diaphragm materialEPDM
ApplicationDistrict Heating
Cavitation factor0.6
Connection typesFlange
Diameter [mm]65 mm
Differential pressure range [bar] [Max]4 bar
Flow controlYes
Flow limitationYes
Flow rate [m³/h]20 m³/h
Flow rate [m³/h] [Max]20 m³/h
Flow rate [m³/h] [Min]4 m³/h
Flow restrictor diff.pressure - dpb [bar]0.3 bar
FunctionFlow controller with int. control valve
Function VSP - PNo
Function VSP - QNo
Function VSP - TNo
Kvs values [m³/h]50 m³/h
Leakage rate [% Kvs]0.05
Media pH [Max]10
Media pH [Min]7
Media temperature [°C] [Max]120 °C
Media temperature [°C] [Min]2 °C
Medium alternativeGlycolic water up to 30%
Mounting versionFree
Number of ports2
Permissible mediaDistrict heating/cooling circulation water
PN alternative VSP10
Pressure classPN 16
Pressure controllerNo
Pressure nominal [bar]16 bar
Sealing CV materialMetal
Sealing DP materialEPDM
Setting TypeNone
Stem positionNormally open
Stroke [mm]15 mm
Valve body materialGrey cast iron EN-GJL-250 (GG-25)
Valve cone CV materialDZR CW602N (CuZn36Pb2As)
Valve cone DP materialStainless steel, mat. No. 1.4305
Valve seat materialStainless steel, mat. No. 1.4305
Valve sizeDN 65
EAN5710104028767
HS code8481.80 (taps, cocks, valves for pipes)

Properties

MaterialGrey cast iron EN-GJL-250 (GG-25)
Pressure ratingPN 16; max. differential pressure 4 bar
Temperature range2 °C to 120 °C
Standard sizeDN 65
MOQ1

Compatibility

Genuine Danfoss part, order code 003L3604 (Pressure flow controllers). Confirm the code, size (DN 65) and matching valve/actuator family against your Danfoss datasheet before ordering.

Attached Documents