KMC Controls MCP-1140-3520 Actuator

The KMC Controls MCP-1140-3520 is a heavy-duty 4-inch pneumatic damper actuator engineered for precise proportional control within commercial HVAC systems. This piston-type actuator operates on a 5 to 10 PSI spring range, providing the consistent force required for modulating damper blades in air handling units and terminal boxes. Designed as a direct functional equivalent to the M574-3520 and 2474-230, it features a rugged die-cast aluminum housing and a high-performance neoprene diaphragm that maintains flexibility across a wide temperature spectrum. The inclusion of a clevis and pin assembly ensures a secure mechanical linkage to the damper shaft, reducing hysteresis and preventing linkage slip during high-velocity airflow conditions. Whether you are performing a retrofit or a new installation, this pneumatic actuator delivers the reliable linear stroke and torque necessary to maintain building pressure and ventilation setpoints without the complexity of electronic components.

Technical Benefits for Contractors

• Universal Compatibility: Serves as a drop-in replacement for the KMC M574-3520 and Barber Colman 2474-230, simplifying inventory and field service.
• High Torque Output: The 4-inch effective diaphragm area provides ample power to drive multi-blade dampers against high static pressure.
• Field Maintenance: Features a replaceable diaphragm assembly and a standard 1/8" NPT air connection for straightforward integration into existing pneumatic lines.
• Precise Modulation: The 5-10 PSI spring shift allows for accurate sequencing in VAV systems and mixing box applications.

Common Questions

Is the mounting bracket included with this model?
The MCP-1140-3520 comes standard with a mounting clevis. Depending on your damper frame, you may require additional 90-degree or flat mounting brackets for proper orientation.

Can this actuator be used in variable air volume (VAV) boxes?
Yes, the 5-10 PSI range is specifically calibrated for VAV terminal units and air handler dampers that require proportional response to pneumatic signals.

What is the maximum supply pressure for the diaphragm?
While the control range is 5-10 PSI, these units are typically tested for a maximum operating pressure of up to 30 PSI to handle system surges without failure.

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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.