• Pre-filters are designed to capture larger particles before they can enter the main HEPA filter
• Without pre-filters, the life of the main filter would be much shorter
• A variety of media and designs are available to allow Purex extractors to be used in a wide range of processes

Pre-filters are designed to capture larger particles before they can enter the main HEPA filter. The Cascade Box acts as an additional prefilter to capture particles in applications where large amounts are produced.