Ventilation check valve

A ventilation check valve designed to ensure one-way air flow in ventilation ducts. Ideal for preventing backflow in HVAC systems.This ventilation check valve model can be easily scaled to fit the size of your duct. Alternatively, you can use the raw file in FreeCAD to adjust the parameters precisely to your needs.The valve must be installed in a vertical position, ensuring that the airflow direction matches the intended flow.If the flaps are too light and do not close properly, you can attach a small wire to add weight. If the flaps are too heavy, you can modify them by reducing their thickness.