Electric damper actuator LFZ series

motorizedrotary90°

Overview
LFZ series rotary damper actuators use imported DC or brushless motors to deliver torques from 2 Nm to 40 Nm. They are designed for direct rotary control of air and water damper systems and accept ON-OFF or analog control (0(2)-10V / 0(4)-20mA) with convertible current/voltage feedback. Mounting is possible on square, round or shaped damper shafts. The series features manual override via gear disengagement, full overload protection and a position indicator. Protection rating IP54; low noise and long service life suitable for industrial HVAC applications.

Electrical parameters
Rated voltage: AC24V 50/60Hz; DC24V; AC10…240V 50/60Hz
Rated voltage range: AC/DC 19.2…28.8V / AC85…265V
Power consumption: operating 4.5W; standby 0.5W
Wire spec: 0.5 mm²; terminal max: 2 mm²

Function parameters
Torque options: 2 Nm, 4 Nm, 6 Nm, 8 Nm, 16 Nm, 24 Nm, 32 Nm, 40 Nm
Suitable damper area (reference): 2Nm → 0.3 m²; 4Nm → 0.5 m²; 6Nm → 0.8 m²; 8Nm → 1.2 m²; 16Nm → 2.5 m²; 24Nm → 3.7 m²; 32Nm → 5.2 m²
Rotation direction: selectable by DIP switch
Manual adjustment: possible after pressing gear-set disengagement button
Nominal / maximum rotation angle: 90° / 95°
Noise level: 46 dBA (at 1 m)
Position feedback: rotation angle indicated by position indicator

Work environment
Electrical class: Class III (safety low voltage) & double insulation (II)
Protection grade: IP54
Operating ambient temperature: -20℃ to +50℃
Storage ambient temperature: -20℃ to +50℃
Temperature/humidity test: 95% RH non-condensing / EN 60730-1

Dimension & Mechanical
Dimensions (L×W×H mm): see dimensional drawing provided
Minimum shaft length required: >50 mm
Weight: < 1.3 kg

Model variants (summary)

• LFZ0224/230-K/KF — Torque: 2 Nm; Supply: 24V/230V; Running time: 20–25 s; Control: ON-OFF; Auxiliary: one set
• LFZ0224/230-M/MF — Torque: 2 Nm; Supply: 24V/230V; Running time: 20–25 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: one set
• LFZ0424/230-K/KF — Torque: 4 Nm; Supply: 24V/230V; Running time: 25–30 s; Control: ON-OFF; Auxiliary: two sets
• LFZ0424/230-M/MF — Torque: 4 Nm; Supply: 24V/230V; Running time: 25–30 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: two sets
• LFZ0624/230-K/KF — Torque: 6 Nm; Supply: 24V/230V; Running time: 25–30 s; Control: ON-OFF; Auxiliary: two sets
• LFZ0624/230-M/MF — Torque: 6 Nm; Supply: 24V/230V; Running time: 25–30 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: two sets
• LFZ0824/230-K/KF — Torque: 8 Nm; Supply: 24V/230V; Running time: 30–45 s; Control: ON-OFF; Auxiliary: two sets
• LFZ0824/230-M/MF — Torque: 8 Nm; Supply: 24V/230V; Running time: 30–45 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: two sets
• LFZ1624/230-K/KF — Torque: 16 Nm; Supply: 24V/230V; Running time: 30–45 s; Control: ON-OFF; Auxiliary: two sets
• LFZ1624/230-M/MF — Torque: 16 Nm; Supply: 24V/230V; Running time: 30–45 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: two sets
• LFZ2424/230-K/KF — Torque: 24 Nm; Supply: 24V/230V; Running time: 120–160 s; Control: ON-OFF; Auxiliary: two sets
• LFZ2424/230-M/MF — Torque: 24 Nm; Supply: 24V/230V; Running time: 120–160 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: two sets
• LFZ3224/230-K/KF — Torque: 32 Nm; Supply: 24V/230V; Running time: 160–200 s; Control: ON-OFF; Auxiliary: two sets
• LFZ3224/230-M/MF — Torque: 32 Nm; Supply: 24V/230V; Running time: 160–200 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: two sets
• LFZ4024/230-K/KF — Torque: 40 Nm; Supply: 24V/230V; Running time: 200–220 s; Control: ON-OFF; Auxiliary: two sets
• LFZ4024/230-M/MF — Torque: 40 Nm; Supply: 24V/230V; Running time: 200–220 s; Control: 0(2)~10V / 0(4)~20mA; Auxiliary: two sets

Documents / Drawings
Product specification PDF and CE certificate (LVD) available on request.

Technical specifications

• Torque range: 2 Nm – 40 Nm
• Control signals: ON-OFF or 0(2)~10V / 0(4)~20mA (M/MF models)
• Supply options: 24V DC / 24V AC / 85–265V AC (model dependent)
• Power consumption: operating 4.5W; standby 0.5W
• Protection grade: IP54
• Operating temperature: -20℃ to +50℃
• Noise: ≈46 dBA (1 m)
• Manual override: gear disengagement button; manual limit provided
• Rotation angle: nominal 90°, maximum 95°
• Min. shaft length: >50 mm; Weight: <1.3 kg
• Auxiliary switches: KF/MF variants include one or two sets as specified