• Pad pre-filter
• Extends the life of the main filter by capturing larger particles before they reach the HEPA filter
• Fits neatly under the main filter
• Graduated fiber matrix delivers excellent particle capture capacity
• Ideal for low-volume applications or where small amounts of particles are produced
• Captures particles to 5 microns at an efficiency of 40 - 60%

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.