Johnson Controls D-3246-2 Damper Actuator

The Johnson Controls D-3246-2 is a heavy-duty pneumatic damper actuator engineered for precise control of large dampers in commercial HVAC systems. This swivel mounted piston-style actuator features a 6-inch stroke and a 23.4 square inch effective diaphragm area, delivering reliable linear motion within an 8-13 psi spring range. To ensure high-accuracy positioning especially in high-velocity airflow or high-friction applications, this model includes the D-9502-5 pilot positioner. Constructed with a die-cast aluminum body and a rugged synthetic rubber diaphragm, the D-3246-2 is designed to withstand a maximum control air pressure of 25 psi. The assembly comes complete with a bracket, clevis, and crankarm, simplifying the integration into existing linkage systems. For contractors managing proportional control systems, this unit offers a low maximum air consumption rate of 2 SCIM, maintaining system efficiency while providing the necessary torque for demanding multi-blade damper configurations.

Key Benefits

• Precision Positioning: The integrated D-9502-5 positioner eliminates hysteresis and ensures the damper reaches the exact commanded position regardless of load variations.
• Exceptional Durability: The die-cast aluminum housing provides superior structural integrity compared to plastic alternatives, ensuring long-term performance in mechanical rooms.
• Flexible Installation: Swivel mounting combined with the included clevis and crankarm allows for easy alignment with various damper shaft diameters and mounting angles.
• Optimized Air Consumption: With only 2 SCIM maximum air consumption, this actuator minimizes the load on the pneumatic plant.

Common Questions

How do I handle air connections for the D-3246-2?
This unit utilizes a standard 1/8" NPT barbed fitting. Ensure your poly tubing is rated for 30 psi to safely accommodate the 25 psi maximum control pressure.

Can the D-9502-5 positioner be bypassed?
While the D-9502-5 is included for high-precision damper control, it is optimized for this specific 6-inch stroke actuator to maintain linear response across the full 8-13 psi range.

What is the effective power stroke of this actuator?
The D-3246-2 utilizes a 23.4 sq. in. diaphragm, which provides significant force output to overcome the static pressure and seal friction typical in industrial-grade dampers.

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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.