Danfoss USV-M DN 40 PN 16 — manual (static) balancing valve for the risers and branches of hydronic heating and cooling systems; the measuring partner valve of the USV pair — carries the measuring/flow-limitation function and is upgradeable in situ to a differential-pressure (PV) controller. Presetting fixes the branch flow so design flow is distributed correctly across the network. Kvs 10 m³/h. Maximum differential pressure 80 kPa. Media temperature -20 to 120 °C. external thread connection (External thread ISO 228/1, G 1 ¾A). Brass body, PN 16. OEM designation "USV-M, DN 40, G 1 ¾A; External thread ISO 228/1". OEM P/N 003Z2130. EAN 5702420083551. Technical data quoted verbatim from store.danfoss.com (code 003Z2130).