Johnson Controls DMPR-KC252 Collar

The Johnson Controls DMPR-KC252 Collar is a specialized service component engineered for field technicians managing legacy HVAC damper control systems. This galvanized steel collar is designed specifically for old-style dampers where the existing blade pin lacks the integrated slot necessary to receive a standard retaining clip. Use the DMPR-KC252 to facilitate a secure, mechanical connection between the damper blade and a blade pin extension, such as the DMPR-KC003 or DMPR-KC005. This hardware ensures that external linkages or actuator drive shafts up to 1/2 inch diameter can be coupled reliably to the original blade assembly without the need for intensive structural modifications. Rated for extreme environments ranging from -40?F to 180?F, this collar shaft kit provides a durable solution for restoring precise airflow control and linkage alignment in older commercial air handling units. By securely locking the extension to the driving blade, it minimizes axial play and prevents slippage under high-torque pneumatic or electric actuation.

Key Benefits

• Ensures legacy damper compatibility by providing a mounting point for extensions on pins without clip slots.
• Constructed from heavy-duty galvanized steel to resist corrosion in high-humidity duct environments.
• Supports 1/2 inch shaft diameters, a standard across many Johnson Controls and third-party damper lines.
• Facilitates seamless actuator mounting by extending the driving blade pin outside the duct or frame.
• Withstands temperature extremes, making it suitable for both outdoor air intakes and high-heat return air applications.

Common Questions

How do I know if I need the DMPR-KC252 instead of a standard pin extension?
If your damper was manufactured before modern clip-slot standards and the existing blade pin is smooth or lacks a groove for a retaining clip, this collar is required to mechanically secure a blade pin extension.

Is this part compatible with non-Johnson Controls dampers?
While designed for Johnson Controls systems, it can often be used as a universal 1/2 inch collar shaft for various legacy systems, provided the dimensions and pin diameter align with the hardware specs.

Can this be used on both parallel and opposed blade dampers?
Yes, the DMPR-KC252 is agnostic to the blade orientation and functions effectively in parallel or opposed operation configurations where a secure extension is needed for the drive blade.

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.