SIIL  damper utilizing only high corrosion resistant parts for air movement and controls. Zero-leakage SIIL dampers are fire retatdant, corrosion resistant, and UV protected.

The Zero-leakage SIIL damper blade is operated using a hand-wheel driven worm gear operator. Pneumatic, electric, or chain-wheel type operaors are optional. Long life teflon bearings accessible from the exterior of the damper require minimum maintenance and ensure unrestricted movement of the roating shaft.