Automatic check valve 150 mm, check valve with sealing rubber for extractor hoods and ventilation ducts

[One-Way Airflow]: Two semicircular deflectors open and close automatically using a single one-way switch. This restricts airflow to one direction, prevents backflow into the ducts, and ensures effective, directed air circulation. [One-Way Airflow Limiter]: When the internal pressure is lower than the external pressure, the airflow is restricted, and the air damper closes automatically. This effectively prevents the ingress of outside noise, birds, rats, rain, and insects. For optimal closure, the damper must be horizontally aligned. [Rubber Seal]: The internal rubber seal not only provides a better seal for the check valve but also reduces operating noise and increases the valve's lifespan. [Easy Installation]: When installing the check valve, it should be pushed as far into the ventilation duct as possible. For horizontal mounting, the spring must be horizontally aligned for optimal opening and closing of the valve. The same applies to vertical mounting. [Wide range of applications]: The valve is designed for use in all supply and exhaust air systems such as air conditioners, clothes dryers, extractor hoods and ventilation systems. This check valve can be used in flexible and rigid ventilation ducts.