At what speed should air be moved through dry filters?

The optimal speed for moving air through dry filters is generally around 0.25 m/s. This flow rate is effective because it balances the need for adequate air circulation with the ability of the filter to effectively capture particulates and contaminants without causing undue wear or pressure drops across the filter media.

At this speed, the airflow is sufficient to ensure proper filtration performance, allowing the filter to operate efficiently without becoming overloaded or excessively blocked. If the airspeed is too low, the contaminants may not be effectively captured, as they can simply pass through the filter. Conversely, if the airspeed is too high, it can lead to insufficient contact time between the air and filter media, decreasing the effectiveness of the filtration process and potentially damaging the filter. Thus, 0.25 m/s is the ideal compromise, ensuring optimal performance of dry filtration systems in various applications.