COVID-19 related supply chain issues are causing up to 3-5 week delays on all orders. We will continue to ship as soon as possible.


Our most popular filter type, the Standard Cartridge Filter is ideal for most industrial and commercial cleaning applications. Provides filtration of 10 microns @ minimum of 98% efficiency. Fits all Guardair 55, 30 and 20 Gallon Drum Vacuums and Vacuum Generating Heads. For finer filtration, substitute HEPA Cartridge Filter or ULPA Cartridge Filter. 

  • Filtration Media: Pleated paper (80% polyester/20% cellulose)
  • Efficiency Rating: 10 microns @ minimum 98% efficiency
  • Galvanized carbon steel cage
  • PVC end seal
  • Carbon steel end cap
  • (1) Standard Cartridge Filter – N635
Part NumberDimensions
(L" x W" x H")
Weight (lbs)
Part Number N635 Dimensions
(L" x W" x H")
12.2 x 10.5 x 10.5
Weight (lbs) 4.0