Siemens Building Technology GQD221.1U Actuator 326058-757 internally calibrated to open the

internally calibrated to open the circuit at 7 PSI and close at 22 PSI

in those specific applications

Reduced Maintenance: Minimizes field call-backs caused by environmental wear or moisture-related shorts

Scalable Architecture: Supports the addition of 19 slave modules for comprehensive 20-zone control

this low limit switch monitors ambient conditions to trigger safety signals or shut down fans when temperatures drop below the setpoint

Siemens Building Technology GQD221.1U Actuator 326058-757 internally calibrated to open theThe Siemens GQD221. 1U Actuator is a direct coupled OpenAir spring return actuator engineered for precise 2 position control in commercial HVAC systems. Operating at 120V AC, this 20 lb in damper actuator is ideal for constant or variable air volume (VAV) installations, common in exhaust, mixed air, and face and bypass applications. Its compact footprint allows for seamless integration into tight enclosures, while the NEMA 1 (IP40) rated housing