Belimo BF230-TN-ST - spring-return actuator for fire dampers

Belimo BF230-TN-ST – actuator for fire and smoke dampers

The spring-return actuator with BAT thermal release (72°C) is designed for fire and smoke dampers in ventilation and air-conditioning systems. While the motor is operating, the return spring is tensioned; when the power supply is interrupted, it moves the damper to the safety position.

Key specifications

• Motor torque: 18 Nm; safety function torque: 12 Nm.
• Rated voltage: AC 230 V, 50/60 Hz; voltage range: AC 198...264 V.
• Control: Open/Close.
• Motor running time: <120 s / 90°; safety function running time: 16 s @ 20°C.
• BAT thermal release: tripping temperature of thermal fuses for the duct interior and surroundings 72°C.
• Auxiliary switches: 2x SPDT; switching points 5° / 80°.
• Mechanical connection: form-fit connection 12x12 mm, non-through hollow shaft.
• Electrical connections: 1 m cables with connection plugs for power supply and control, and for auxiliary switches.
• Power consumption: 8.5 W during operation, 3 W at rest; wire sizing power: 11 VA.
• IEC/EN degree of protection: IP54; IEC/EN protection class: II, reinforced insulation.

The motor direction of rotation can be selected by left/right mounting. The actuator allows manual adjustment with a position stop and has a mechanical position indicator. The set includes a hand crank, indicator, protective bag and 12/10 mm form-fit insert.