Danfoss USV-M DN 15 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 1.6 m³/h. Maximum differential pressure 80 kPa. Media temperature -20 °C to 120 °C. internal thread connection (Internal thread ISO 7/1; Rp 1/2). Brass body, PN 16. OEM designation "USV-M, DN 15, Internal thread ISO 7/1; Rp 1/2". OEM P/N 003Z2121. EAN 5702420082394. Technical data quoted verbatim from store.danfoss.com (code 003Z2121).