BELIMO LF230-S

The BELIMO LF230-S solves the challenge of maintaining safe and reliable damper operation in critical HVAC, fire-safety and building automation applications. Many systems require not only motorised damper actuation, but also a fail-safe mechanism to bring the damper to a safe position (open or closed) in case of power loss. The LF230-S integrates a spring-return mechanism so if the supply voltage is interrupted, the actuator drives the damper via spring energy to the predefined fail-safe position — ensuring system safety and compliance. With a torque rating of 4 Nm, it handles dampers up to approx. 0.8 m² cross-section. belimo.com+2belimo.com+2 The built-in SPDT auxiliary switch provides real-time feedback or interlock capability (e.g., signalling damper status to a fire control panel or BAS), which many basic actuators lack. The wide voltage compatibility (AC 100-240 V) and the universal shaft clamp (Ø 8–16 mm) make installation and integration straightforward across various systems and damper sizes. Its IP54 rating and robust design provide durability in demanding environments. Compared to alternatives that may lack spring-return functionality or require external sensors, the LF230-S offers an all-in-one solution—reducing wiring complexity, lowering maintenance, and increasing reliability. Especially for your fire-service, home-automation or parking-system work via your MSI Agency, this actuator gives you peace of mind: safe default behaviour, clear feedback and broad compatibility.