Description
Siemens GQD221.1U — 120V Spring Return Damper Actuator
The Siemens GQD221.1U is a 120-volt, 20 lb-force spring return (S/R) damper actuator engineered for dependable performance in commercial and industrial HVAC systems. Designed under Siemens Building Technology standards, this actuator delivers consistent, fail-safe damper positioning — automatically returning to its spring-loaded default position upon loss of power or control signal, making it an ideal choice for life-safety and critical ventilation applications.
Key Features
- Operating Voltage: 120V AC
- Torque Rating: 20 lb-force (20#)
- Spring Return (S/R) fail-safe operation — returns to default position on power loss
- Designed for use with HVAC dampers in commercial building automation systems
- Siemens Building Technology quality construction for long-term reliability
- Suitable for air handling units, VAV systems, and ventilation damper control
Why Choose the Siemens GQD221.1U?
The spring return design ensures fail-safe operation — a critical requirement in fire, smoke, and outside air damper applications. The 120V power supply makes it compatible with standard North American HVAC control systems, and the 20 lb-force output provides sufficient torque for a wide range of commercial damper sizes. Backed by Siemens’ reputation for precision engineering, the GQD221.1U is a trusted solution for building automation contractors and mechanical engineers.
Applications
- Commercial HVAC air handling units
- Variable air volume (VAV) systems
- Outside air and exhaust damper control
- Building automation and energy management systems
- Life-safety ventilation damper applications
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