Pentair's X-Flow XF75 membrane element, Evonik's new VOC separation technology and Lydall's planned fine fiber meltblown production line in France were the most-read news stories on the Filtration+Separation website during September.

1. Pentair releases X-Flow XF75 membrane element

The company has redesigned the internal workings and used modified materials to create extra membrane surface area.

2. Evonik expands technology for VOC separation

The PuraMem VOC offers a polymer-based membrane technology for separation of long-chain hydrocarbons from a natural gas or nitrogen mixture.

3. Lydall to add fine fiber meltblown production line in France

The filtration media will be used for face masks and high-efficiency air filtration systems.