Knowing if your application requires high volumes of airflow but low pressure or high pressure and low volumes is just one of the questions that need to be answered in order to determine the correct industrial fan selection.
It is important to also take into consideration factors such as:
When determining the pressure required it is important to consider system restrictions. For example, additional pressure may be required to achieve flow across a filter, or to compensate a pressure drop due to length, size and complexity of ducting.
All ducting will have an effect on the air passing through a system and this will nearly always take the form of a restriction to the flow and therefore have an influence on pressure requirements.
At the earliest stage in the design process the ducting should be carefully evaluated and made as efficient as possible. This will reflect beneficially on the final design in the overall cost, the compactness of the fan and the running costs.
In reality, there are many factors that impact upon fan specification and applications that demand particular air movement characteristics for cooling, exhausting, aerating, ventilating and drying should undergo a ‘system resistance’ assessment. Only by evaluating all the impacting factors (flow resistance, power units, size, space envelope) is it possible to ensure maximum efficiency and reliability of both the fan and the equipment involved.
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