The ERI PX-220 (also written PX220) is a 220 GPM (50 m³/h) isobaric pressure exchanger designed for seawater reverse osmosis systems in the 10,000–25,000 GPD range. Standard PX series delivers 97%+ pressure transfer efficiency, cutting SWRO energy by 55-60%. The PX-220 contains a single ceramic rotor that spins hydraulically (no motor) at 1,200-1,800 RPM. As the rotor spins, axial channels alternately fill with low-pressure feed water and high-pressure brine. The pressure transfers directly fluid-to-fluid, recovering the high-pressure brine energy and pressurizing incoming feed at 97% efficiency. This eliminates the need for the high-pressure pump to handle the full feed flow — only the permeate fraction (~40%). Customers searching for this device commonly use these keywords: PX-220, PX220, ERI PX-220, ERI PX220, px-220 pressure exchanger, px220 energy recovery device, px-220 SWRO. ForeverPure stocks the PX-220 and standard PX series for same-week dispatch. Send us your SWRO system specs (target permeate flow, feed water TDS, operating hours) and we'll confirm PX-220 fit and provide a formal quote within one business day. Request PX-220 Quote → · All ERI PX Models · SWRO Buyer's GuideERI PX-220 (PX220) Pressure Exchanger: 220 GPM Isobaric Energy Recovery for SWRO
PX-220 Quick Specifications
Manufacturer Energy Recovery Inc (ERI) Model PX-220 (also written PX220) Flow Rate 50 m³/h (220 GPM) Max Pressure 83 bar (1,200 psi) Efficiency 97%+ SWRO System Range 10,000–25,000 GPD product water Materials 2507 super-duplex stainless steel housing, alumina ceramic rotor Acoustic ~78 dB(A) Stock In stock How the PX-220 (PX220) Works
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