Danfoss USV-I DN 25 PN 16 — manual (static) balancing valve for the risers and branches of hydronic heating and cooling systems; the presetting and isolating partner valve — sets the design flow (setting scale), shuts off and drains the circuit. Presetting fixes the branch flow so design flow is distributed correctly across the network. Kvs 4 m³/h. Maximum differential pressure 150 kPa. Media temperature -20 °C to 120 °C. external thread connection (External thread ISO 228/1; G 1 ¼A). Brass body, PN 16. OEM designation "USV-I, DN 25, External thread ISO 228/1; G 1 ¼A". OEM P/N 003Z2138. EAN 5702420083582. Technical data quoted verbatim from store.danfoss.com (code 003Z2138).