Energy Recovery Inc’s PX Devices to Replace
DWEER Units at Red Gate Desalination Plant on
Grand Cayman Island
Industry-Leading Energy Recovery Devices Offer Significant Reduction in Energy Consumption and Operational
Costs Compared to Existing Technologies
May 18, 2010 08:03 AM Eastern Daylight Time
SAN LEANDRO, Calif.--(EON: Enhanced Online News)--Energy Recovery Inc (NASDAQ: ERII), a leader in
the design and development of energy recovery devices for desalination, today announced that the company’s
industry-leading PX Pressure Exchanger™ (PX™) energy recovery devices will replace competing isobaric units at
the Red Gate seawater reverse osmosis (SWRO) desalination plant on Grand Cayman Island. Originally built in
1989 by Consolidated Water Co. Ltd., the Red Gate facility is currently undergoing a retrofit, including an upgrade
of desalination technologies. Energy Recovery’s PX devices will help Consolidated Water and the Water Authority-
Cayman to cost-effectively deliver more than 4,900 cubic meters(1.3 million gallons) of potable water per day. The
decision to replace the existing DWEER devices with PX units was based on reliability and overall lifecycle cost.
Unlike the DWEER units and other competing energy recovery technologies, Energy Recovery’s PX devices
operate without pulsations and water hammer. Massive pulsations have been known to complicate and delay plant
startups and may damage plant structures, compromise peripheral desalination equipment and/or adversely affect
plant safety. In addition, PX devices have just one moving part made out of ceramic material that smoothly rotates
with the flow of water. This simple yet elegant design requires no scheduled maintenance, making PX devices
constantly available and reducing costly system downtime common in other isobaric competing technologies.
“SWRO desalination has been an integral part of Grand Cayman’s water supply for years but in order to sustain the
process long-term it is important that the cost of producing potab