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SWEP Sealix®¹ is a new BPHE range that feature a protective layer on all inner surfaces of the BPHE, resulting in enhanced behavior in terms of metal leaching, scaling, fouling and corrosion while maintaining thermal and hydraulic performance. The SXB16DW is a double wall product that combines Sealix® features with a high thermal efficiency, minimal leakage, and improved leak detection for water applications. All parts in contact with water are covered by the SiO₂-based layer.