Belimo ZDB-LF Rotation Limiter

The Belimo ZDB-LF Angle of Rotation Limiter is a field-installable accessory designed specifically for the LF series spring-return actuators. This mechanical stop allows technicians to precisely calibrate the stroke of the actuator when the application requires less than the standard 90-degree rotation. Constructed from durable, corrosion-resistant materials, the ZDB-LF ensures long-term reliability in demanding HVACR environments. It is essential for protecting dampers and valves from mechanical stress by limiting travel to specific design requirements. Installation involves securing the limiter onto the actuator housing, providing a hard physical stop that prevents over-rotation. For damper actuator accessories, maintaining mechanical limits is critical for balancing airflow and protecting downstream components. This Belimo actuator part is compatible with all LF24 and LF120 models, offering a simple solution for adjusting actuator stroke in the field without requiring complex recalibration or external controllers.

• Mechanical Precision: Provides a rigid physical stop for LF series actuators, ensuring repeatable positioning and preventing linkage strain.
• Field Versatility: Allows for quick adjustments to the angle of rotation, making it ideal for custom damper configurations or retrofits.
• System Protection: Reduces the risk of damage to light-duty damper blades and seals by preventing over-travel beyond intended limits.
• Direct Compatibility: Engineered by Belimo for a seamless fit, eliminating the need for makeshift field modifications.

Can the ZDB-LF be used to adjust both the start and end points of rotation?
The limiter is primarily designed to restrict the total stroke of the Belimo LF by providing a physical stop on the housing. If you require precise start-point calibration, ensure the actuator is properly indexed on the shaft before tightening the universal clamp.

Will this limiter interfere with the spring-return fail-safe function?
No, the ZDB-LF is designed to work within the mechanical profile of the LF series. It limits the rotation angle but does not impede the internal spring-return mechanism's ability to drive to the zero-position during power loss.

Is this compatible with the larger NF or AF series actuators?
No, this specific part is sized exclusively for the LF series. For larger torque actuators, you must use the ZDB-AF or corresponding series-specific rotation limiters to ensure proper fitment and mechanical strength.

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.