Belimo AMB24-SR 24V Non-Spring Return Modulating Actuator 180 lb-in

The Belimo AMB24-SR is a robust 24-volt AC/DC non-spring return modulating actuator designed for precise control of dampers and valves in HVAC systems. With 180 lb-in of torque, this actuator provides reliable operation for medium to large damper applications requiring accurate positioning control.

Key Features:

• 24V AC/DC universal power supply for flexible installation
• 180 lb-in (20 Nm) torque output for demanding applications
• Non-spring return operation maintains position on power loss
• Dual control signal inputs: 2-10 VDC or 4-20 mA
• Modulating control for precise positioning throughout the full range
• 95° rotation angle with adjustable end switches
• Direct mounting with universal NEMA-style mounting brackets
• Auxiliary switch for status indication or interlocking

The AMB24-SR features Belimo's proven design with a maintenance-free gear train and electronic overload protection. The dual input capability allows integration with a wide range of building automation systems and controllers. The non-spring return design makes it ideal for applications where fail-in-place operation is required, reducing energy consumption by eliminating the need for continuous power to hold position against a spring.

This actuator is commonly used for damper control in air handling units, economizer systems, mixing boxes, and VAV terminal units. The rugged construction and reliable performance make it suitable for both new construction and retrofit applications.