Ultra High-Pressure RO Go Back PX U Series Energy Recovery Energy Recovery’s PX U Series is a range of energy recovery devices uniquely designed for ultra-high pressure reverse osmosis (UHPRO) systems to provide significant energy savings and a sustainable path to water and wastewater treatment and reuse. The PX U series offers operational cost savings when implementing minimal and zero liquid discharge (MLD/ZLD), operating across fluctuating flow and pressure levels to handle variable wastewater Energy Recovery Device +3 Pressure Exchanger Ultra High-Pressure RO Water Management