LF24-S - Belimo Spring-return Damper Actuator 4 Nm, 75 s, 95° AC / DC 24 V, Open/Close 1 x SPDT
£200.76
£167.30
On request
SKU
LF24-S
Next Supplier Stock Update: 11/03/2025
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Manuals & Datasheets
| DATA-SHEET |
 |
| Product type | Actuator |
| IP rating | IP54 |
| Input Signal | On/Off |
| Manufacturer | Belimo |
| Power Supply | 24Vac/Vdc |
| Torque | 4 Nm |
| Running time | 65 to 80 sec |
| End Switches | 1 End Switch |
| Actuator type | Rotary |
| Fail Safe | Spring Return |
Find all the components for your ventilation system at IACS. All Belimo Actuators on hand are eligible for Free Delivery and 1-2 Delivery.
The Belimo LF24-S is a kind of Actuator used in HVAC applications and air ventilation systems.
The Torque used by the LF24-S is 4 Nm.
The power supply requested for this Rotary Actuator is 24Vac/Vdc.
The ideal Belimo Actuators for your system are most affordable at iacs.If you have questions concerning size or installation, refer to the Belimo custom datasheet above or email iacs for individualised support.
The Belimo LF24-S is a Spring-return actuator with a torque of 4 Nm, 75 s, 95° AC / DC 24 V, Open/Close action.
Application For the operation of air dampers that perform safety functions (e.g. frost and smoke protection, hygiene, etc.).
Mode of operation The LF... actuator moves the damper to its normal working position while tensioning the return spring at the same time. If the power supply is interrupted, the energy stored in the spring moves the damper back to its safe position.
Features
Simple direct mounting on the damper spindle by universal spindle clamp. An antirotation device is supplied to prevent unwanted rotation of the whole unit.
Mechanical angle of rotation limiting adjustable with built-in stop.
High functional reliability The actuator is overload proof, needs no limit switches and halts automatically at the end stop.
Flexible signalling 0...100% , with adjustable auxiliary switch (LF24-S only).
• Spring-return actuator 4 Nm, 40...75 s (0...4 Nm), 95° AC / DC 24 V, Open/Close, 1 x SPDT IP 54
• Running time spring < 20 s
• Control Open/Close with single-wire contact
• Connection PVC cable 1m
• Auxiliary switch 0...100 % adjustable
• Rating 1 mA...3(0.5)A, AC 250 V
• Spindle driver universal spindle clamp
• Direction of rotation reversible (right/left)
• Angle of rotation limit. mech. adjustable
• Nominal voltage AC 24 V 50/60 Hz, DC 24 V
• Nominal voltage range AC 19.2...28.8 V, DC 21.6...28.8 V
• For wire sizing 7 VA (Imax 5.8 A @ 5 ms)
• Power consumption – motoring 5 W – holding 2.5 W
• Connecting cable – motor 1 m long, 2 x 0.75 mm2 – auxiliary switch (LF24-S) 1 m long, 3 x 0.75 mm2
• Auxiliary switch (LF24-S) 1 x SPDT 6 (1.5) A, AC 250 V – Switching point adjustable 0...100%
• Direction of rotation selected by mounting L/R
• Torque – motor min. 4 Nm (at rated voltage) – spring return min. 4 Nm
• Angle of rotation max. 95° (adjustable 37...100% with built-in mechanical stop)
• Running time – motor 40...75 s (0...4 Nm) – spring return ≈20 s @ –20...50 °C / max. 60 s @ –30 °C
• Sound power level motor max. 50 dB (A), spring ≈62 dB (A)
• Service life min. 60 000 operations
• Position indication mechanical
• Protection class (safety extra-low voltage)
• Degree of protection IP 54
• Ambient temp. range – 30...+50 °C
• Non-operating temp. – 40...+80 °C
• Humidity test to EN 60335-1
• EMC CE according to 89/336/EEC, 92/31/EEC, 93/68/EEC
• Low Voltage Directive CE according to 73/23/EEC
• Maintenance maintenance-free
• Weight 1400 g