Danfoss MSV-F2 DN 250 — flanged double-regulating manual balancing valve for the main risers and large branches of hydronic heating and cooling systems. The MSV-F2 sets and limits circuit flow by a lockable presetting on a graduated scale, with two self-sealing test plugs for differential-pressure/flow measurement and commissioning, and a full shut-off function. Body Cast iron, PN 16, Kvs 1238 m³/h, flanged connection per EN 1092-1, media temperature -10 °C to 130 °C. OEM P/N 003Z1141. EAN 5710104523392. Technical data quoted verbatim from store.danfoss.com (code 003Z1141).