Belimo Lf24-Sr Rotary Actuator Fail-Safe for Adjusting Dampersin Technical Building Installations

• Customization: Available
• Signal ′1′ (Response): V
• Service Life: >5 X 106 Switching Cycles
• Model NO.: LF24-SR
• Kv Coefficient: 0.15
• Auxiliary Power: Reverse Polarity Protection
• Transport Package: Carton
• Specification: 20*20*20
• Trademark: Samson
• Origin: Germany
• HS Code: 8481100090
• Production Capacity: 5

Product Description

Belimo LF24-SR

The actuator is controlled with a control signal Y (note the operating range) and moves the damper to the operating position at the same time as tensioning the return spring. The damper is turned back to the fail-safe position by spring force when the supply voltage is interrupted..

Specification

Type of action Type 1
Rated impulse voltage supply / control 0.8 kV
Pollution degree 3
Ambient humidity Max. 95% RH, non-condensing
Ambient temperature -30...50°C [-22...122°F]
Storage temperature -40...80°C [-40...176°F]
Servicing maintenance-free

Torque motor 4 Nm
Torque fail-safe 4 Nm
Operating range Y 2...10 V
Input impedance 100 k
Position feedback U 2...10 V
Position feedback U note Max. 0.7 mA
Position accuracy ±5%
Direction of motion motor selectable with switch L/R
Direction of motion fail-safe selectable by mounting L/R
Manual override No
Angle of rotation Max. 95°

Key Configurations

Input Signal
PointtoPoint.
Analog Input Signal: 420 mA DC, nominal; split
ranging available
Minimum Voltage Available at Instrument Terminals
must be 9.5 VDC for analog control, 10 VDC for HART
communication
Minimum Control Current: 4.0 mA
Minimum Current w/o Microprocessor Restart: 3.5 mA
Maximum Voltage: 30 VDC
Overcurrent protected
Reverse Polarity protected
Multidrop
Instrument Power: 11 to 30 VDC at 10 mA
Reverse Polarity protected

right elevation

left elevation

front elevation

Technical Specifications

(Custom configurations available upon request.)

Model	EX200	EX300	EX400
Operating Weight (kg)	20,000	30,500	45,000
Engine Power (kW)	110	165	220
Bucket Capacity (m³)	0.8–1.2	1.2–1.8	1.8–2.5
Max Digging Depth (m)	6.2	7.5	8.8
Max Reach (m)	9.5	11.2	13.6
Fuel Tank (L)	350	450	600

Drawings & Dimensions

Detailed CAD drawings and dimensional diagrams are available for download here or upon inquiry. Our engineering team can provide tailored designs to meet specific project requirements.

After Sales Service

Standard Warranty: 12 months or 2,000 operating hours (whichever comes first).
Extended Warranty: Optional coverage up to 36 months.
Global Support: 24/7 technical assistance and spare parts supply.
Training: On-site or remote operation/maintenance training.

Company Profile

FAQ

Q: What’s the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone [phone])for a quote, then confirm with a PO.