Siemens Building Technology 331-4313 Actuator

The Siemens 331-4313 No. 3 Pneumatic Actuator is a heavy-duty, bellows-operated rugged metal actuator designed for proportional control of medium-to-large dampers and terminal units. Operating within a 3 to 7 psi spring range, this unit provides a consistent 2-3/8 inch stroke for precise mechanical positioning. Engineered with a fixed mounting configuration and a neoprene diaphragm, it maintains high-torque performance in demanding HVAC environments. This model serves as the reliable technical successor and direct replacement for M573-8111, M573-8108, MCP-1030-8111, MCP-1030-8108, and MCP-0308. For contractors performing retrofits or system maintenance, the Siemens 331-4313 ensures a drop-in fit with existing linkage kits, maintaining pneumatic damper control integrity without requiring extensive field modifications. Its all-metal housing is built to withstand temperature fluctuations, ensuring long-term HVAC actuator stability and proportional air control accuracy in critical air handling applications.

Key Benefits

• Precise Proportional Control: The 3-7 psi nominal spring range allows for accurate positioning throughout the full damper stroke.
• Broad Cross-Compatibility: Engineered to replace several legacy Siemens and Powers MCP series actuators, streamlining inventory and field selection.
• Durable Construction: Features a rugged metal body and high-quality internal bellows for superior resilience against mechanical stress.
• Optimized Linkage Attachment: The fixed mounting design provides a stable platform for standard damper actuator assembly configurations.

Common Questions

What are the primary applications for the Siemens 331-4313?
This pneumatic damper actuator is typically used for operating large volume control dampers, mixing boxes, and ventilation units where high force and reliable 2-3/8" mechanical travel are required.

Can this unit replace old Powers MCP-1030 series actuators?
Yes, the 331-4313 is the verified replacement for the MCP-1030-8111 and related models, offering the same footprint and performance characteristics for seamless HVAC part replacement.

What is the maximum pressure rating for this actuator?
While the control range is 3-7 psi, these pneumatic HVAC controls are typically rated for a maximum control air pressure of 30 psi, though one should always calibrate based on specific damper torque requirements.

This item is not eligible for free shipping.

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.