Danfoss AVPB differential pressure controller & flow limiter, PN 25, DN 15, 0.2–1 bar adjustable, 0.03–0.9 m³/h, external thread G ¾ A
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Product Description
Danfoss AVPB (003H6444) — self-acting differential pressure control and flow limiter, PN 25, DN 15, for district heating and cooling systems. The AVPB closes on rising differential pressure or when the set maximum flow is exceeded, holding a stable differential pressure across the controlled circuit so connected control valves keep their authority. It combines a control valve, an adjustable flow restrictor and an actuator with one control diaphragm and handle for differential-pressure setting. Differential-pressure setting 0.2–1 bar adjustable; flow rate 0.03–0.9 m³/h; Kvs 1.6 m³/h. Maximum differential-pressure range 20 bar, media temperature 2–150 °C, cavitation factor z ≥ 0.6, seat leakage 0.02 % Kvs (IEC 60534). Valve body Red bronze CuSn5ZnPb (Rg5); valve cone dezincing-free brass CuZn36Pb2As; seat stainless steel 1.4571; control diaphragm and DP sealing EPDM. Connection External thread G ¾ A (ISO 228/1), via tailpieces. Media: district heating/cooling circulation water. OEM P/N 003H6444. Technical data quoted verbatim from store.danfoss.com (code 003H6444) and the Danfoss AVPB/AVPB-F (PN 16, 25) operating guide. differential-pressure range 20 bar); Temperature range: 2 to 150 °C (district heating/cooling water); HS code: 8481.80. Used in commercial refrigeration, provision-room cooling and reefer plant rooms across HFC, HFO and CO2 (R744) refrigerants.
Technical Specifications
- Code number
- 003H6444
- Type
- AVPB
- Product group
- Pressure and flow controllers (differential pressure control & flow limiter)
- Function
- Self-acting differential pressure control and flow limiter with an adjustable differential-pressure setting
- Valve size
- DN 15
- Pressure class
- PN 25
- Connection
- External thread G ¾ A (ISO 228/1), via tailpieces
- Kvs value
- 1.6 m³/h
- Flow rate [m³/h]
- 0.03 - 0.9
- Differential pressure setting
- 0.2 - 1 bar (adjustable, factory range)
- Max. differential pressure range
- 20 bar
- Media temperature
- 2 - 150 °C
- Cavitation factor z
- ≥ 0.6
- Seat leakage rate
- 0.02 % Kvs (IEC 60534)
- Mounting version
- Return
- Permissible media
- District heating/cooling circulation water
- Valve body material
- Red bronze CuSn5ZnPb (Rg5)
- Valve cone material
- Dezincing-free brass CuZn36Pb2As
- Valve seat material
- Stainless steel, mat. no. 1.4571
- Diaphragm / DP sealing
- EPDM
- EU RoHS compliance
- Yes with exemptions (6(c))
- REACH Candidate List substance
- Lead (CAS no. 7439-92-1)
- China RoHS
- Out of scope
- Net weight
- 3.54 kg
- Gross weight
- 3.54 kg
- EAN
- 5702421539637
Standards & Compliance
- Material
- Valve body Red bronze CuSn5ZnPb (Rg5); valve cone dezincing-free brass CuZn36Pb2As; valve seat stainless steel 1.4571; control diaphragm and DP sealing EPDM
- Pressure Rating
- PN 25 (max. differential-pressure range 20 bar)
- Temperature Range
- 2 to 150 °C (district heating/cooling water)
- HS Code
- 8481.80
Compatibility & Fitment
Danfoss AVPB for DN 15 district-heating/cooling circuits at PN 25. Size by the branch design flow (0.03–0.9 m³/h here) and set the differential-pressure setpoint within 0.2–1 bar. Confirm the connection (External thread G ¾ A (ISO 228/1), via tailpieces) and pressure class (PN 25) match the pipework; order the matching tailpiece/union-nut set and impulse tube separately. Maximum differential-pressure range 20 bar, media temperature up to 150 °C.
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 003H6444?
- 003H6444 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 003H6444.
- What is the HS code for 003H6444?
- The customs tariff (HS) code for 003H6444 is 8481.80.
- Who manufactures 003H6444?
- 003H6444 is a Danfoss product in the HVAC & Refrigeration range.
- Is a datasheet available for 003H6444?
- Yes — the 003H6444 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 003H6444?
- The minimum order quantity is 1.
- Is 003H6444 available?
- Yes — 003H6444 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).