Danfoss AMV 658 SU electric linear actuator, OEM order code 082G3446. Supply voltage 24 V AC. Rated stroke 50 mm, closing force 2000 N, actuator speed 2 / 6 s/mm (selectable). Control is 3-point (floating), driving Danfoss seat/globe control-valve bodies in response to a two-wire raise/lower signal. The actuator is fitted with safety spring-return function (spring up / stem extends on power loss), so the valve moves to its safe end position on loss of supply. Power consumption 19 W. Enclosure IP54, protection class II per EN 60730-1. Ambient range 0 °C to 55 °C, with manual override. The AMV 658 SU motorises large Danfoss globe/seat valve bodies (VFG 2, VFGS 2, VFU 2, VFQ 2, VF and matched series); the 50 mm stroke and 2000 N force suit the large DN range of those valves. Application: HD District Heating. Net weight 8.8 Kilogram. Data quoted verbatim from store.danfoss.com (code 082G3446).