What is the purpose of a bead on a collar?

A bead on a collar serves the purpose of providing both stiffness and acting as a stop in HVAC applications. The incorporation of a bead into the design enhances the structural integrity of the collar, preventing it from deforming under pressure or weight, which is especially important in ductwork where air flow and pressure are critical. This stiffening effect improves the overall durability and performance of the collar in the system.

Moreover, the bead acts as a stop, which ensures that the duct or pipe fits securely and is properly aligned when connected to other components. This is crucial for maintaining airtight joints, preventing leaks that could undermine the efficiency of the HVAC system.

The effectiveness of a bead as both a stiffener and a stop is essential in ensuring that the system operates correctly and maintains its intended functionality over time.