Dow Water & Process Solutions Engineers Low-Energy Reverse Osmosis Element

Minneapolis-based Dow Water & Process Solutions has introduced the Dow FILMTEC™ HRLE-440i
high-rejection, low-energy element with advanced membrane chemistry. The new reverse osmosis (RO)
membrane, available as a dry element for easy storage and improved shelf life, delivers 99.5
percent sodium chloride rejection at 150 pounds per square inch. According to the company, the
element effectively rejects silica, boron, nitrate and ammonium while meeting ANSI/NSF 61
certification requirements for drinking water system components.

“This advance in membrane chemistry allows new RO equipment to be designed around lower
pressure membranes, meeting permeate quality with up to 30 percent less energy than conventional
brackish water membranes,” said Chris Sacksteder, strategic market manager for industrial water,
Dow Water & Process Solutions. “In addition to energy efficiency, with 440 square feet of
active area, the Dow Filmtec HRLE-440i membrane allows fewer elements to be used in a system
design. This shrinks the overall system footprint, related to enery use and operational costs.”

December 7, 2010