Danfoss AVQ flow controller, PN 25, DN 20, flow range 0.16–3.5 m³/h, Kvs 6.3 m³/h, G 1 A external thread (003H6725)

Danfoss AVQ (003H6725) — self-acting flow controller, PN 25, DN 20, for district heating and cooling systems. The AVQ is a self-acting flow controller for district heating and cooling systems. It holds the flow rate constant and closes when the set maximum flow is exceeded. It has a control valve with an adjustable flow restrictor and an actuator with one control diaphragm; the valve and actuator are delivered assembled with the impulse tube fitted. Flow range 0.16–3.5 m³/h; flow-restrictor differential pressure 0.2 bar; Kvs 6.3 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, mat. No. 1.4571; control diaphragm EPDM. Connection External thread G 1 A (ISO 228/1), via tailpieces. Mounting version Free. Permissible media: District heating/cooling circulation water (Glycolic water up to 30%), pH 7–10. OEM P/N 003H6725. EAN 5702421542460. Technical data quoted verbatim from store.danfoss.com (code 003H6725) and the Danfoss AVQ data sheet.