Danfoss RLV-S — manual lockshield radiator valve for two-pipe hydronic heating systems, OEM order code 003L0126. The RLV-S is a standard return-side lockshield (isolating) valve: it lets an individual radiator be shut off for maintenance or removal without draining the rest of the system. Adjustment for regulation and isolation is by a 6 mm hex socket in the valve body, normally covered by a screw-on cap. RLV-S DN 20, straight pattern. Body brass, finish Nickel plated. Connection to system Rp 3/4, connection to radiator R 3/4 (Internal thread), Kvs 2.2 m³/h. Max. working pressure 10 bar, test pressure 16 bar, flow temperature up to 120 °C. Genuine Danfoss part; technical data quoted verbatim from store.danfoss.com (code 003L0126). OEM P/N 003L0126, EAN 5702420035857. HS 8481.80.