Johnson Controls D-4073-2 Damper Actuator

The Johnson Controls D-4073-2 Damper Actuator is a heavy-duty pneumatic piston damper actuator engineered for precise positioning in unit ventilators, VAV terminal units, and small ventilating systems. This multipurpose positioning device features an 8-13 PSI spring range and a reliable 3" stroke, providing the necessary mechanical force to operate dampers up to 6.75 square feet for proportional control or 11.7 square feet for two-position actuation. Constructed with a glass-reinforced polymer housing, this direct replacement for D-3073 is corrosion-resistant and chemically resilient, ensuring longevity in demanding mechanical rooms. The integrated universal mounting bracket and telescoping linkage simplify field installation, while the 2-way swivel connection prevents binding for smooth power delivery. With a maximum air pressure rating of 25 psig and versatile 1/8" NPT barbed fittings for 5/32" or 1/4" OD tubing, the D-4073-2 remains a standard for contractors maintaining legacy pneumatic control systems.

• Engineered Compatibility: Designed as a functional drop-in replacement for Johnson Controls D-251 and D-3073 series actuators.
• Industrial Durability: Glass-reinforced polymer housing offers superior resistance to corrosion and environmental degradation compared to standard metal units.
• Installation Flexibility: Includes a universal mounting bracket and telescoping linkage to accommodate various attachment points up to 8-3/4 inches.
• Smooth Operation: Features a 2-way swivel connection at the cylinder head to eliminate mechanical binding during the 3-inch stroke.
• Standardized PSI: Optimized for standard HVAC 0-20 psig control air pressure signals.

What is the maximum torque capacity for this actuator?
The D-4073-2 is rated to handle dampers up to 6.75 sq. ft. for proportional applications and 11.7 sq. ft. for two-position setups, provided the air pressure is within the nominal 20 psi range.

Can I use this with different tubing sizes?
Yes, the included 1/8" NPT straight barbed fitting is compatible with both 5/32" and 1/4" OD polytubing, allowing for easy integration into existing pneumatic lines.

What are the operating temperature limits?
This actuator is built to withstand ambient operating conditions ranging from -20 to 150°F (-29 to 66°C).

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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.