BELIMO SY1-230-3-T

The BELIMO SY1‑230‑3‑T actuator is a high‑performance rotary unit designed for controlling butterfly valves in HVAC, ventilation and water distribution systems. Its 35 Nm torque ensures solid actuation — even on larger dampers or valves under pressure — guaranteeing reliable opening and closing of butterfly valves. The 230 V AC power supply and 3‑point control make it easy to integrate into existing HVAC or water‑flow control circuits without special power adapters.

With 90° rotation and built-in internal limit switches, the device ensures precise valve position and safe operation, while the two integrated auxiliary SPDT switches offer feedback or control signals to building management systems, adding a layer of safety and automation compatibility. The rugged, die‑cast aluminium housing with IP67 protection makes SY1‑230‑3‑T suitable for both indoor and demanding environments (subject to ambient conditions), resistant to dust and water ingress.

Maintenance is minimal — the actuator is maintenance‑free — and in case of power failure or servicing, the manual override feature using a wrench allows technicians to manually operate the valve. Compared to cheaper generic actuators, the BELIMO unit stands out in build quality, operational reliability, and suitability for professional HVAC and industrial jobs. For building managers or contractors, this means fewer failures, longer service intervals and dependable automated control of flow/dampers.