Built with a durable cast iron body material

providing a broad application scope across residential and commercial units

Durable Construction: Engineered by Honeywell for high-cycle industrial machinery and heavy-duty HVAC applications

and C connections

Siemens Building Technology 331-3000 Actuator 322056-301 Built with a durable castThe Siemens 331 3000 is a heavy duty, No. 4 pneumatic damper actuator engineered for reliable control of large dampers in commercial HVAC environments. As a veteran preferred HVAC pneumatic control solution, this rugged, metal fabricated unit is designed to provide gradual or positive actuation of terminal units, mixing boxes, and fire smoke dampers. It features a 4 inch stroke and a nominal 3 7 psi spring range, allowing for precise sequencing with