Belimo EFB24-SR-N4 Actuator

The Belimo EFB24-SR-N4 is a heavy-duty spring return actuator engineered for high-torque applications requiring fail-safe operation in demanding environments. Delivering 270 in-lb of torque, this proportional damper actuator utilizes a 2 to 10 VDC control signal and operates on both 24VAC/DC power. The rugged NEMA 4 (IP66) housing ensures reliable performance in outdoor or wash-down conditions, protecting internal components from corrosion and moisture ingress. Designed for seamless HVAC automation, the brushless DC motor provides precise positioning and consistent timing across its 95-degree rotation. The spring return fail-safe mechanism ensures the damper or valve returns to its programmed safety position during power loss, minimizing system risks. Its universal clamp design facilitates quick installation on standard shafts, making it a preferred choice for direct-coupled mounting in industrial ventilation and air handling units.

• High Torque Output: Provides 270 in-lb (30 Nm) of torque, sufficient for large dampers and high-pressure air handlers.
• Rugged Enclosure: The NEMA 4 (IP66) rated aluminum housing allows for reliable operation in extreme weather or industrial environments.
• Precise Control: Modulating 2-10 VDC control signal allows for exact positioning and efficient airflow management.
• Fail-Safe Reliability: Mechanical spring return ensures the unit closes or opens fully upon loss of power for system protection.
• Low Power Consumption: Efficient brushless DC motor technology reduces operational costs and extends service life.

Common Questions

Can the Belimo EFB24-SR-N4 be mounted outdoors?
Yes, this unit features a NEMA 4 / IP66 rated enclosure, making it suitable for outdoor installation provided proper conduit fittings are used to maintain the seal.

What is the typical run time for this actuator?
The motor drive time is approximately 95 seconds for 95 degrees of rotation, while the spring return takes less than 20 seconds to return to the fail-safe position.

Does this model support manual override?
Yes, the EFB24-SR-N4 includes a manual override crank, allowing technicians to position the damper manually during setup or emergency maintenance.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.