Danfoss AMV 658 SD electric linear actuator, OEM order code 082G3444. 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 down / stem retracts to close 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 SD 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 9.65 Kilogram. Data quoted verbatim from store.danfoss.com (code 082G3444).