This hardware set eliminates the need for full valve replacement when updating hydronic control systems

this 650-450 PSI pressure control is critical for preventing catastrophic system failure and ensuring residential and light commercial units operate within safe thermal and mechanical limits

Code 1 Matching: Precision engineering ensures that multiple B116 V-belts can be used in matched sets for balanced power sharing

providing a broad application scope across residential and commercial units

Built with a durable cast iron body material

Siemens Building Technology 331-3000 Actuator 322056-301 This hardware set eliminates theThe 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