Belimo Motorised Valve 20 mm – R3020-S2 + LR24A-SR Changeover ball valve, 3-way, Internal thread Technical Data Sheet For closed water systems For switching functions and open/close controls on the water side of air handling systems and heating systems Air-bubble tight (control path A – AB) Port A – AB: air-bubble tight, leakage rate A (EN 12266-1); Bypass B – AB: Leakage class I (EN 1349 and EN 60534-4) max. 1% of the Kvs value Download PDF Now