Danfoss AVD pressure-reduction controller, PN 25, DN 15, kVS 0.4 m³/h, setting 3 – 12 bar, external thread G 3/4 A, flow mounting (003H6978)

Danfoss AVD (003H6978) — self-acting pressure-reduction controller, PN 25, DN 15, flow mounting, 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 0.4 m³/h; adjustable pressure setting range 3 – 12 bar; maximum differential pressure 20 bar. Medium temperature 2–150 °C; leakage 0.02% of kVS (IEC 534); Valve body red bronze CuSn5ZnPb (Rg5), valve seat stainless steel 1.4571, valve cone dezincing free brass CuZn36Pb2As, actuator diaphragm EPDM. Connection external thread G 3/4 A (ISO 228/1). OEM P/N 003H6978, EAN 5710104031859. Technical data quoted verbatim from store.danfoss.com (code 003H6978).