The air doors are available in five models: single-axis, double-axis, triple-axis, quadruple-axis, and quintuple-axis, with 66 specifications ranging from 300×400 to 2400×2000. The air doors can be horizontally or vertically installed. The square air doors are all self-contained without a drive installation, allowing for the selection of either an electric or manual device as per requirement.

Multi-blade steel circular dampers are categorized by nominal diameter, with specifications ranging from DN1000 to DN4000, totaling 18 types. These dampers are used in circular pipelines, capable of both cutting off medium flow and adjusting the medium flow rate.

Circular dampers are classified according to nominal diameter, with specifications ranging from DN100 to DN1400, totaling 18 types. The protruding part of the circular damper housing is designed for mounting a worm gear box. The circular damper is equipped with stop pins to ensure the full opening of the baffle.

The shutter damper ensures sufficient tightness when closed, with a leakage rate less than 2% when fully shut.

The air door features sufficient rigidity to prevent deformation and sticking during thermal expansion and contraction. Sealing measures are in place at the contact points between the sliding doors and the door frame, avoiding non-elastic hard contacts.