Filter efficiency is a measure of how well a filter removes particles from a fluid. It is typically expressed as a percentage, with a higher percentage indicating better efficiency. Filter efficiency is important because it determines how well the filter can protect the downstream equipment or process from contamination.
There are many different types of filters, each with its own unique efficiency rating. The type of filter that is used will depend on the specific application. For example, a high-efficiency particulate air (HEPA) filter is used to remove very small particles from the air, while a pre-filter is used to remove larger particles from the air before it reaches the HEPA filter.