Danfoss AVD (003H6981) — self-acting pressure-reduction controller, PN 25, DN 15, for district heating and central-heating circuits. The AVD is a self-acting pressure-reduction controller that requires no auxiliary energy: it holds a constant reduced downstream pressure, closing on rising outlet pressure, using a control valve and a spring-loaded actuator diaphragm. kVS 2.5 m³/h; adjustable pressure setting range 3 – 12 bar. OEM P/N 003H6981, EAN 5710104096773. Technical data quoted verbatim from store.danfoss.com (code 003H6981).
| Code number | 003H6981 |
| Type | AVD |
| Function | Press. reduction controller |
| Product group | Pressure and flow controllers |
| Description | Self-acting pressure-reduction controller (district heating), adjustable setting |
| Valve size | DN 15 |
| Pressure class | PN 25 |
| kVS value | 2.5 m³/h |
| Pressure setting range | 3 – 12 bar (adjustable) |
| EU RoHS compliance | Yes with exemptions (6(c)) |
| REACH Candidate List substance | Lead (CAS no. 7439-92-1) |
| Net weight | 5.416 Kilogram |
| Gross weight | 5.457 Kilogram |
| Packed volume | 10.944 Liter |
| EAN | 5710104096773 |
| HS code | 8481.80 |
| China RoHS compliance | Out of scope |
| Diameter [mm] | 15 mm |
| EU RoHS exemption clause | 6(c) |
| Kvs values [m³/h] | 2.5 m³/h |
| Pressure setting range [bar] [Max] | 12 bar |
| Pressure setting range [bar] [Min] | 3 bar |
| REACH Candidate List substances | Lead (CAS no. 7439-92-1) |
| Pressure rating | PN 25 |
| MOQ | 1 |
Danfoss AVD for DN 15 district-heating circuits, PN 25. Size by the design flow (kVS 2.5 m³/h) and set the reduced-pressure setpoint within 3 – 12 bar. Confirm the pressure class (PN 25) against the pipework. Genuine Danfoss part — specify order code 003H6981.