The Danfoss RAS-D2 combi pack (013G6013) combines a high-performance liquid sensor with a 15 mm RA-FS bi-directional angled valve. It supports 8/10/15 mm fittings and features flow-selectable “revolver” technology to eliminate water-hammer. Temperature range is 8–28 °C, with a frost-protection setting and a positive-off feature for flexible control in two-pipe domestic heating systems.