Energy Recovery Announces Launch of VorTeq for Hydraulic Fracturing Industry

San Leandro, Calif. — December 8, 2014 — Energy Recovery Inc. (NASDAQ: ERII), the leader in pressure energy technology for industrial fluid flows, today announced the release of the VorTeqTM hydraulic pumping system, the first product engineered to increase runtime and reduce maintenance costs by rerouting abrasive frac fluid away from existing hydraulic fracturing pumps.

The current fracking pumping technology requires intensive and costly maintenance. In many cases, pumps are repaired and serviced daily. Energy Recovery’s VorTeq, designed to replace the traditional hydraulic fracturing manifold trailer, or “missile,” is expected to more than double the useful life of pump components that most frequently fail.

VorTeq re-routes proppant-filled fluid away from high-pressure pumps on fracking sites so these pumps only process fresh water, and therefore last significantly longer. VorTeq channels the abrasive fluids and sends them down the wellbore.

Liberty Oilfield Services, a subsidiary of Liberty Resources LLC, has signed an agreement to be the first well fracturing services provider to use Energy Recovery’s VorTeq hydraulic pumping system.

“The new VorTeq pumping system will change the way that companies frack, providing a more reliable and more cost-effective process. Beginning with our first customer, Liberty Oilfield Services, and given the significant ROI, we believe this product will become the new industry standard and will help Energy Recovery drive substantial growth and shareholder value. With our entry into hydraulic fracturing, we solidify our status as a diversified energy solutions provider with powerful and inevitable value propositions throughout oil & gas, chemical and water industrial fluid flow applications,” said Tom Rooney, CEO of Energy Recovery.

“Liberty Oilfield Services has always embraced emerging breakthroughs in the field, and VorTeq is the next major revolution in hydraulic fracturing technology. This system will give service providers a competitive edge by allowing substantial cost savings and additional production capacity. With fewer at-risk hours spent on maintenance, we believe VorTeq will also enhance safety during frac jobs,” said Ron Gusek, Vice President Technology & Development, Liberty Oilfield Services.

The core of the VorTeq hydraulic pumping system is Energy Recovery’s Pressure Exchanger (PX) technology, which is already in use in more than 15,000 desalination installations worldwide. The system handles up to 110 barrels per minute, with a treating pressure up to 15,000 psi. The system is elegantly designed with only one moving part, and made from tungsten carbide, which is 1,000 times more abrasion-resistant than steel.

Neal Hageman, Engineering Manager at Integrated Petroleum Technologies, worked with Energy Recovery to provide insight on the maintenance challenges faced by the service companies performing these treatments. Hageman said, “The maintenance challenges associated with pumping large volumes of proppant at high pressures and rates are an accepted part of day-to-day operations. Incorporating the VorTeq system could represent a paradigm shift in how the service company industry approaches preventative maintenance, because hydraulic horsepower pumps will no longer be exposed to the abrasive slurry mixture of proppant and water, the source of most maintenance issues. Eliminating these issues will reduce backup requirements and improve overall operational efficiency.”

Additional information on Energy Recovery’s VorTeq system can be found on the Company’s website www.energyrecovery.com.

Please visit Energy Recovery’s website at http://ir.energyrecovery.com/phoenix.zhtml?c=221013&p=irol-presentations to download presentation slides, which will be presented at the event.

About Energy Recovery Inc.

Energy Recovery (NASDAQ: ERII) develops award-winning solutions to improve productivity, profitability, and energy efficiency within the oil & gas, chemical, and water industries. Our products simplify complex systems and protect vulnerable equipment. By recycling fluid pressure that would otherwise be lost in critical processes, we save clients more than $1.4 billion (USD) annually. Headquartered in the Bay Area, Energy Recovery has offices in Madrid, Shanghai, and Dubai.

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Investor Relations Contact:

ir@energyrecovery.com

Media Contact:

Alex Dolan

Marketing Communications Director

510.746.2574

adolan@energyrecovery.com