Puritan Magnets' Air-Vey Magnets are designed to remove ferrous contaminants from products in pneumatic conveying systems operating at 15 PSI or less. Our EZ Clean style is also known as a Center-Flow Magnet, Torpedo Magnet (because the internal magnet element somewhat resembles a torpedo or bullet), Cartridge Magnet or Pneumatic Line Magnet these units are used to ensure product purity and protect process equipment.