Danfoss AFQM 2 DN 125 PN 25 pressure-independent flow control valve — flange, Kvs 250 m³/h, flow 30–150 m³/h
Pricing
Request a quote
We reply within 24 hours
Product Description
Danfoss AFQM 2 DN 125 PN 25 — self-acting pressure-independent flow control valve (flow limiter with integrated control valve) for district heating and district cooling circuits. Combines automatic flow limitation with a control valve in one body; the flow set point is held independent of differential-pressure variation across the valve. Flange connection. Kvs 250 m³/h; adjustable flow range 30–150 m³/h (flow restrictor differential pressure dpb 0.5 bar). Media temperature 2 °C to 150 °C. Maximum operating pressure 25 bar. Body Ductile cast iron EN-GJS-400-18-LT (GGG 40.3); valve cone and seat Stainless steel mat. No. 1.4021; EPDM seals and rolling diaphragm. Normally-open stem, stroke 23 mm. Medium: district heating/cooling circulation water (glycolic water up to 30%). OEM designation "AFQM 2, PN 25, DN 125, Flow rate [m³/h]: 30 - 150, Flange, Mounting version: Free". OEM P/N 003G5521. EAN 5710104522739. Technical data quoted verbatim from store.danfoss.com (code 003G5521).
Technical Specifications
- Code number
- 003G5521
- Type
- AFQM 2
- Product group
- Pressure flow controllers
- Gross weight
- 93 Kilogram
- Net weight
- 91 Kilogram
- Volume
- 284.708 Liter
- Actuator diaphragm material
- EPDM (Rolling, fibre enforced)
- Actuator size [cm²]
- 160 cm²
- Application
- District heating and cooling
- Cavitation factor
- 0.4
- Cavitation factor 100%
- 0.3
- Cavitation factor 25%
- 0.46
- Cavitation factor 50%
- 0.46
- Cavitation factor 75%
- 0.42
- China RoHS compliance
- Out of scope
- Connection size
- DN 125
- Connection types
- Flange
- Contains batteries
- No
- Description
- Pressure independent control valve
- Diameter [mm]
- 125 mm
- Differential pressure range [bar] [Max]
- 15 bar
- EU RoHS compliance
- Out of scope
- Flow control
- Yes
- Flow limitation
- Yes
- Flow rate [m³/h]
- 150 m³/h
- Flow rate [m³/h] [Max]
- 150 m³/h
- Flow rate [m³/h] [Min]
- 30 m³/h
- Flow restrictor diff.pressure - dpb [bar]
- 0.5 bar
- Function
- Flow controller with int. control valve
- Function VSP - P
- No
- Function VSP - Q
- No
- Function VSP - T
- No
- Kvs values [m³/h]
- 250 m³/h
- Leakage rate [% Kvs]
- 0.01
- Leakage through port max. [% Kvs]
- 0.01
- Media pH [Max]
- 10
- Media pH [Min]
- 7
- Media temperature [°C] [Max]
- 150 °C
- Media temperature [°C] [Min]
- 2 °C
- Medium alternative
- Glycolic water up to 30%
- Mounting version
- Free
- Number of ports
- 2
- Operating pressure [bar] [Max]
- 25 bar
- Permissible media
- District heating/cooling circulation water
- PN alternative VSP
- 40
- Pressure class
- PN 25
- Pressure controller
- No
- Pressure nominal [bar]
- 25 bar
- Pressure relieve system control valve insert
- Chamber
- REACH Candidate List substances
- Lead (CAS no. 7439-92-1)
- SCIP dossier no.
- b7b59542-4217-4c5c-96a5-552807d72d74
- SCIP dossier product name
- AFQM DN65-400
- Sealing CV material
- EPDM
- Sealing DP material
- EPDM
- Setting Type
- Fixed
- Stem position
- Normally open
- Stroke [mm]
- 23 mm
- Valve body material
- Ductile cast iron EN-GJS-400-18-LT (GGG 40.3)
- Valve cone CV material
- Stainless steel mat. No. 1.4021
- Valve cone DP material
- Stainless steel mat. No. 1.4021
- Valve seat DP material
- Stainless steel, mat. No. 1.4021
- Valve seat material
- Stainless steel, mat. No. 1.4021
- Valve size
- DN 125
- EAN
- 5710104522739
- HS code
- 8481.80
Standards & Compliance
- Size / Series
- AFQM 2
- Material
- Valve body Ductile cast iron EN-GJS-400-18-LT (GGG 40.3); cone/seat Stainless steel mat. No. 1.4021; EPDM diaphragm and seals
- Pressure Rating
- PN 25
- Temperature Range
- 2 °C to 150 °C
- HS Code
- 8481.80
Compatibility & Fitment
AFQM 2 is a self-acting flow limiter with an integrated control valve; select by pipe size (DN 125), pressure class (PN 25) and required flow range. The AFQM range spans DN 65–250 in PN 16 / PN 25 / PN 40, each size offered in two overlapping flow bands (flow-restrictor dpb 0.2 bar or 0.5 bar). For combined flow + differential-pressure limitation use AFQMP; for an external electric set-point use the AFQM 6 / motorised variants. Confirm DN, PN and flow band against the AFQM data sheet before ordering.
Product Documentation
More from Danfoss
Danfoss
Danfoss AFQM 2 DN 150 PN 25 pressure-independent flow control valve — flange, Kvs 380 m³/h, flow 32–160 m³/h
003G5522
Danfoss
Danfoss AFQM 2 DN 150 PN 25 pressure-independent flow control valve — flange, Kvs 380 m³/h, flow 48–240 m³/h
003G5523
Danfoss
Danfoss AFQM 2 DN 200 PN 25 pressure-independent flow control valve — flange, Kvs 650 m³/h, flow 54–270 m³/h
003G5524
Danfoss
Danfoss AFQM 2 DN 200 PN 25 pressure-independent flow control valve — flange, Kvs 650 m³/h, flow 68–340 m³/h
003G5525
Danfoss
Danfoss AFQM 2 DN 250 PN 25 pressure-independent flow control valve — flange, Kvs 800 m³/h, flow 72–360 m³/h
003G5526
Danfoss
Danfoss AFQM 2 DN 250 PN 25 pressure-independent flow control valve — flange, Kvs 800 m³/h, flow 100–500 m³/h
003G5527
Danfoss
Danfoss AFQM 2 DN 65 PN 40 pressure-independent flow control valve — flange, Kvs 60 m³/h, flow 5.6–28 m³/h
003G5528
Danfoss
Danfoss AFQM 2 DN 65 PN 40 pressure-independent flow control valve — flange, Kvs 60 m³/h, flow 8.4–42 m³/h
003G5529
Technical guides
- Flange Finder — EN 1092-1 PN6 to PN40 and ASME B16.5 Class 150/300 by DN, Pressure Rating and Type (Weld Neck, Slip-On, Blind, Plate)
- Cross-Referencing Danfoss Refrigeration Components by IMPA and OEM Code
- Danfoss Product Code Decoder — 003Z, 013G, 017B, 023U, 027L, 032F, 060G, 060H, 065B, 065Z, 068Z, 084H, 132F, 148B Series (Complete Reference)
Catalogue entry last verified: 2026-08-24. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 003G5521?
- 003G5521 can be ordered from cballast.com as a Danfoss catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this Danfoss product?
- The manufacturer part number is 003G5521.
- What is the HS code for 003G5521?
- The customs tariff (HS) code for 003G5521 is 8481.80.
- Who manufactures 003G5521?
- 003G5521 is a Danfoss product in the HVAC & Refrigeration range.
- Is a datasheet available for 003G5521?
- Yes — the 003G5521 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 003G5521?
- The minimum order quantity is 1.
- Is 003G5521 available?
- Yes — 003G5521 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).