Couplings and Back draft shutters

Male connector. Used to connect two separate air ducts.

Used to connect:

• filter with fan
• flange with reducer
• fan with reducer

A check valve is an automatic mechanism designed to connect two air ducts in the construction of ventilation systems. The valve is equipped with metal wings that open when there is air flow in one direction and close when the air is drawn back. When there is no air flow, the wings remain closed with the help of a spring.

• Designed for connecting 2 separate air ducts
• Prevents treated air from returning back into the room