Belimo ZG-AFB118 Adaptor Kit

For contractors retrofitting existing dampers, the Belimo ZG-AFB118 Crankarm Adaptor Kit provides a critical mechanical interface for mounting AFB and NFB series actuators. This HVAC actuator accessory is engineered to facilitate damper linkage transitions where direct coupling is not feasible. The kit includes a heavy-duty crankarm adaptor, mounting bracket, and necessary hardware to ensure a rigid, slip-free connection between the actuator drive shaft and the damper drive rod. Built for high-torque applications, the Belimo ZG-AFB118 allows for precise stroke adjustment and mechanical fail-safe operation within complex air handling unit configurations. Whether you are performing a Belimo actuator retrofit or a new damper motor installation, this kit ensures the actuator torque is transferred efficiently without compromising the damper linkage alignment. This is a standard field-solution for NEMA 2 rated environments where reliable HVAC valve and actuator link performance is non-negotiable.

Key Benefits

• Compatible with AFB and NFB spring return actuators for seamless damper motor replacement.
• Constructed from heavy-gauge galvanized steel to prevent linkage deflection under high loads.
• Simplifies pivot point alignment for HVAC mechanical retrofits on older damper frames.
• Provides adjustable crankarm positioning to fine-tune damper blade travel and seal integrity.
• Standardized hardware kit reduces field fabrication time during commercial HVAC maintenance.

Common Questions

Can the ZG-AFB118 be used with non-spring return Belimo actuators?
This specific kit is machined for the spline and mounting patterns of AFB and NFB series actuators. For non-spring return units like the GM or AM series, different mounting brackets are required to ensure proper shaft engagement.

What is the maximum shaft diameter this kit can accommodate?
The crankarm adaptor is designed to interface with standard 1/2-inch to 3/4-inch damper shafts, provided the linkage kit is properly aligned to avoid side-loading the actuator bearings.

How do I ensure the actuator doesn't slip on the crankarm?
Always use the provided lock washers and torque the fasteners to manufacturer specifications to maintain a code-compliant HVAC actuator assembly.

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.