Product Innovation

ERI’s PX Pressure Exchanger™ (PX™) is an innovative technology that can reduce the amount of energy required in seawater desalination by up to 60%, resulting in more economical production of drinking water and a reduced carbon footprint.

ERI’s PX devices, which feature only one moving part, are the most elegant approach to high-efficiency energy recovery available today. The heart of the PX is an aluminum oxide rotor, floating in an almost frictionless hydrodynamic bearing. This ceramic material is unaffected by chemicals, is three times harder than steel, and does not corrode. The bearing is continuously lubricated by seawater, requires no maintenance, and is not subject to wear.

The invention and development of the PX device has led to seven US patents, in addition to international patents, trademarks and numerous awards.