The SSD-3V series are UL, ULC and California State Fire Marshal listed as a UL555S smoke damper. The SSD-3V series is available with UL555S Class I or Class II leakage ratings and a variety of electric and pneumatic actuators
Available with either UL Class I or Class II leakage.
Available for both vertical and horizontal mount.
Full range of factory sleeve gauges and lengths available
Available with 24VAC, 120VAC or 230VAC electric actuators or Pneumatic actuators