Siemens Building Technology 331-4314 Actuator 320074-702 the AT-211 shield prevents dirt

the AT-211 shield prevents dirt buildup

ensuring all screw holes and ports align perfectly with the orifice plate

while a "closed" failure results in a cold radiator due to condensate backup

reaching up to 10 SCFM

which indicates a perforated or hardened Hydrotherm diaphragm

Siemens Building Technology 331-4314 Actuator 320074-702 the AT-211 shield prevents dirtThe Siemens 331 4314 is a pneumatic damper actuator engineered for precise proportional control in commercial HVAC systems. This HVAC damper actuator features a 3 7 psi nominal spring range, making it a critical component for maintaining accurate modulation within air handlers and multi zone ventilation setups. Utilizing a rugged fixed mounting configuration, this No. 3 series actuator ensures proper mechanical alignment, which significantly reduces