The Belimo LMB, NMB, AMB, GMB Series direct coupled damper actuators and valve actuators provide damper control and valve control for non-spring return applications in Building Automation Systems, BAS, or HVAC environment. Each actuator comes in two-position, tri-state (floating), proportional, and Multi-Function Technology (MFT) models. All actuators include a manual release mechanism for manual override. Kele offers a variety of accessories to work with Belimo non-spring return actuators.