Danfoss AFA 2 PN 40 self-acting pressure-relief actuator — setting 1–3 bar, 160 cm² diaphragm, valve DN 65–250
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Product Description
Danfoss AFA 2 PN 40 — a self-acting pressure-relief controller (surplus-pressure / overflow controller). It opens the matching globe valve body via its rolling-diaphragm actuator when the controlled pressure rises above the spring setting, discharging surplus flow to hold the upstream pressure at the set maximum. The actuator carries the diaphragm and setting spring only; it combines with a Danfoss VFG 2 / VFGS 2 / VFU 2 globe valve body (ordered separately) to form a complete self-acting controller for district heating and district cooling circuits. Actuator diaphragm area 160 cm²; setting 1–3 bar; suits valve bodies DN 65–250. Media temperature 2 °C to 150 °C; maximum operating pressure 40 bar. Actuator housing Steel, mat. 1.0345, zinc plated; diaphragm EPDM (Rolling, fibre enforced). Medium: district heating/cooling circulation water (glycolic water up to 30%). OEM designation "AFA 2, PN 40, 1 bar - 3 bar, 160 cm²". OEM P/N 003G5671. Technical data quoted verbatim from store.danfoss.com (code 003G5671). 1.0345, zinc plated; diaphragm EPDM (Rolling, fibre enforced); Standard size: AFA 2; Pressure rating: PN 40; Temperature range: 2 °C to 150 °C; HS code: 8481.90. Used in commercial refrigeration, provision-room cooling and reefer plant rooms across HFC, HFO and CO2 (R744) refrigerants. No.
Technical Specifications
- Code number
- 003G5671
- Type
- AFA 2
- Product group
- Actuators - Pressure Flow
- Gross weight
- 15.7 Kilogram
- Net weight
- 14.5 Kilogram
- Volume
- 52.304 Liter
- Actuator diaphragm material
- EPDM (Rolling, fibre enforced)
- Actuator size [cm²]
- 160 cm²
- Body material
- Steel, mat. No. 1.0345, zinc plated
- China RoHS compliance
- Out of scope
- Contains batteries
- No
- Description
- Pressure relief actuator
- Diameter [mm] [Max]
- 250 mm
- Diameter [mm] [Min]
- 65 mm
- Differential pressure setting [bar] [Max]
- 3 bar
- Differential pressure setting [bar] [Min]
- 1 bar
- EU RoHS compliance
- Out of scope
- Flow control
- No
- Flow limitation
- No
- Function
- Press. relief controller
- 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
- Bypass
- Operating pressure [bar] [Max]
- 40 bar
- Permissible media
- District heating/cooling circulation water
- Pressure class
- PN 40
- Pressure controller
- Pressure relief controller
- Pressure nominal [bar]
- 40 bar
- Pressure setting range [bar] [Max]
- 3 bar
- Pressure setting range [bar] [Min]
- 1 bar
- REACH Candidate List substances
- Lead (CAS no. 7439-92-1)
- Setting Type
- Adjustable
- EAN
- 5715162375037
- HS code
- 8481.90
- Nominal diameter
- DN65
Standards & Compliance
- Size / Series
- AFA 2
- Material
- Actuator housing Steel, mat. No. 1.0345, zinc plated; diaphragm EPDM (Rolling, fibre enforced)
- Pressure Rating
- PN 40
- Temperature Range
- 2 °C to 150 °C
- HS Code
- 8481.90
Compatibility & Fitment
AFA 2 is the self-acting actuator of the Danfoss AF range; it combines with a Danfoss VFG 2 / VFGS 2 / VFU 2 globe valve body to build a complete controller. Select by pressure class (PN 40), required setting range (1–3 bar), actuator size (160 cm²) and the valve-body size range (DN 65–250). For differential-pressure relief use AFPA; for pressure reduction use AFD; for differential-pressure control use AFP; for flow limitation use AFQ. AFA mounts in a bypass line. Confirm actuator size, setting range and matching valve body against the AF-range data sheet before ordering.
Product Documentation
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Technical guides
- 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)
- Danfoss Maneurop MTZ Reciprocating Compressors — Model Range, Voltage Codes and Replacement Guide
Catalogue entry last verified: 2026-08-29. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy 003G5671?
- 003G5671 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 003G5671.
- What is the HS code for 003G5671?
- The customs tariff (HS) code for 003G5671 is 8481.90.
- Who manufactures 003G5671?
- 003G5671 is a Danfoss product in the HVAC & Refrigeration range.
- Is a datasheet available for 003G5671?
- Yes — the 003G5671 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 003G5671?
- The minimum order quantity is 1.
- Is 003G5671 available?
- Yes — 003G5671 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).