Siemens VA50.4Z-3.0VKF10-N4 HVAC Damper Actuator

Siemens VA50.4Z-3.0VKF10-N4 HVAC Damper Actuator is a complete damper control assembly that combines the SQM50.464R1Z3 damper motor with a 3-inch VKF10 valve, purpose-built for precise modulation of HVAC dampers in climate control and combustion air systems. The “N4” suffix denotes a NEMA 4-rated enclosure, enabling reliable operation in harsh indoor or outdoor environments. This part number represents a VA50.4 valve-actuator assembly designed for Siemens VA50.4 series installations, delivering coordinated motor and valve actuation in a single unit. For the SQM50 family, the 3.0 torque/time code corresponds to 15 Nm of torque with a 12-second 90° stroke, providing repeatable positioning for accurate damper control. The SQM50.464R1Z3 designation identifies the specific damper motor board revision used in this model, ensuring compatibility with Siemens control logic and field wiring conventions. The 3-inch VKF10 valve size indicates the nominal valve dimension integrated into the actuator, suitable for common damper assemblies in commercial HVAC and industrial applications where reliable, unit-mounted actuator performance is required. Typical applications include modulating air supply dampers to regulate airflow, assist in boiler or burner air control, and coordinate with building automation systems to meet dynamic ventilation and combustion requirements. This actuator assembly is ideal where a compact, integrated solution is preferred, combining precise mechanical movement with a robust enclosure to withstand demanding service conditions.