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Ravenscroft specialises in providing innovative and energy efficient engineering solutions for the heating and ventilating sector. Our customised engineering solutions yield high quality indoor air while reducing HVAC operating costs.

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     Datasheet Qty Was  Now
lf24 sr LF24-SR, 4 Nm, spring return
Rotary actuator fail-safe for adjusting dampers in technical building installations
• Air damper size up to approx. 0.8 m²
• Torque motor 4 Nm
• Nominal voltage AC/DC 24 V • Control modulating 2...10 V
• Position feedback 2...10 V
Download 2 $350 $150
LM24 S LM24-S, 4 Nm
Damper actuator is intended for the operation of air control dampers in ventilation and air-conditioning systems
• Air damper size up to approx. 0.8 m2
• Torque motor 4 Nm 
• Nominal voltage AC/DC 24 V
• Control Open/close
• Single-wire or 2-wire system
Download 6 $173 $76
LM24A SR LM24A-SR, 5 Nm, modulating
Modulating damper actuator for adjusting dampers in technical building installations
• Air damper size up to approx. 1 m2
• Torque motor 5 Nm
• Nominal voltage AC/DC 24 V
• Control modulating 2...10 V
• Position feedback 2...10 V
Download 6 $198 $99
LM230A S LM230A-S, 5 Nm, open/close, 3-point
Damper actuator for adjusting dampers in technical building installations
• Air damper size up to approx. 1 m2
• Torque motor 5 Nm
• Nominal voltage AC 230 V
• Control Open/close, 3-point
• with integrated auxiliary switch
Download  3 $181 $70
LMU230 LMU230, 5 Nm

For operation of air control dampers in HVAC systems
• Torque 5 Nm
• Nominal voltage AC 100...240 V
• Control: Open/Close or 3-point

Download 1  $163 $70
LMS24 MF LMS24-MF 100 101 000, 5 Nm, 24 VAC/DC 
Programmable, modulating, self adaptive actuator

Input 2 ... 10V
U5 2 ... 10 V
Programmable version of LMS24-SR 1 $220 $120
NMU24  NMU24, 10 Nm
• For operation of air control dampers in HVAC systems
• Torque 10 Nm
• Nominal voltage AC/DC 24 V
• Control: Open/Close or 3-point
Download 1  $195 $99
NMU24 SR NMU24-SR, 10 Nm, modulating
For operation of air control dampers in HVAC systems
• Torque 10 Nm
• Nominal voltage AC/DC 24 V
• Control signal: DC 2(0) ...10 V
• Position feedback: DC 2 ... 10 V
Download 6  $267 $150
NRU230 NRU230, 10 Nm, rotary actuator
• Torque 10 Nm
• Non-spring return rotary actuator
• Modulating control
• Control: Open/Close, floating control 
Download 1  $189 $130
SM24A MP SM24A-MP
Communicative damper actuator for adjusting dampers in technical building installations
• Air damper size up to approx. 4 m2
• Nominal torque 20 Nm
• Nominal voltage AC/DC 24 V
• Control modulating, communicative DC (0)2...10 V Variable
• Position feedback DC 2...10 V Variable
• Conversion of sensor signals
• Communication via Belimo MP-Bus
Download 2  $395 $240
SM24A MF SM24AX-MF, 20 Nm, parameterisable, modulating, AC/DC 24 V

Multifunctional damper actuator for adjusting air dampers in ventilation and air-conditioning systems for building services installations
- For air dampers up to approx. 4 m2
- Torque 20 Nm 
- Nominal voltage AC/DC 24 V
- Control: Modulating DC 0 ... 10 V or variable
- Position feedback DC 2 ... 10 V or variable with connecting terminals
- Electrical data Nominal voltage AC/DC: 24 V
- Nominal voltage frequency: 50/60 Hz
- Nominal voltage range AC: 19.2...28.8 V / DC 21.6...28.8 V
- Power consumption in operation: 3.5 W 
- Power consumption in rest position: 1.3 W 
- Power consumption for wire sizing: 6 VA 
- Connection supply / control Cable: 1 m, 4 x 0.75 mm²

  2 $378 $180
TR24 SR TR24-SR, Rotary actuator for ball valves
• Torque motor 2 Nm
• Nominal voltage AC/DC 24 V
• Control modulating 2...10 V
Download 2 $156 $121

 All prices excluding GST.