EPS Membrane Filter Cartridges with polyethersulfone (PES) membrane are power-flushed low particle, low extractable filter cartridges that are resistant to most acids and bases and capable of handling strong sanitization agents. High flow rates make polyethersulfone (PES) a good choice for central DI systems. This membrane will also handle elevated temperatures in compatible fluids. To remove all manufacturing debris and minimize extractables, each cartridge module is pulse-power flushed until the rinse effluent reaches 17+ Megohmcm and less than 3 ppb TOC. Each cartridge module is also individually tested.