Beijing HeChen Environmental Engineering Co.,Ltd (hereafter, called "HeChen") can design and manufacture various duct dampers based on customer's reqquirement as shown in following pictures. These duct dampers have less than 1% leak rate, and a long use life. They can be controlled manually and automatically.
1) This duct damper is controlled automatically by actuator and motor.
The damper dimension can be determined by customer's requirement.
2) This duct damper is controlled manually beacause it is not often opened or closed in operation. The damper dimension can be determined by customer's requirement.
3) These duct dampers are waiting for shipping out.
4) The work mechanism of duct dampers is shown in the following two figures.
The damper has special flexible seals