Siemens Building Technology 331-2961 Actuator 321894-709 such as thermistor burnout or

such as thermistor burnout or logic board degradation

Enhanced Durability: Dust-shielded design protects the magnetic coil and mechanical linkage from debris common in outdoor environments

Advanced Surge Damping: Jumper-controlled 5-second averaging prevents "hunting" and stabilizes readings in turbulent hydronic systems

ensuring robust performance under typical static pressure conditions found in residential heating systems

Siemens Building Technology 331-2961 Actuator 321894-709 such as thermistor burnout orThe Siemens 331 2961 is a high performance No. 4 pneumatic damper actuator engineered for precise control in commercial HVAC systems. This rugged, metal fabricated pneumatic piston actuator features a 4 inch stroke and is designed for the gradual or positive actuation of dampers in ventilating systems, mixing boxes, and air handling units. With a 8 13 psi spring range, it provides the necessary force for reliable operation in high demand environments.