The air door is 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 door can be horizontally or vertically installed. The square air doors are all self-contained without drive installation, allowing for the selection of electric or manual devices as per requirement.

Multi-blade steel circular dampers are categorized by nominal diameter, with specifications ranging from DN1000 to DN4000, totaling 18 types. Multi-blade steel circular dampers are used in circular pipelines, capable of blocking 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 is designed for mounting a worm gear box. The damper is equipped with a stop pin to ensure the full opening of the baffle.

The baffle 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 baffles and the door frame, avoiding non-elastic hard contact.