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Hydranautics

CPA6-LD CPA Hydranautics Nitto 8,000 GPD at 225 PSI 8 x 40 inch Membranes

CPA6-LD CPA Hydranautics Nitto 8,000 GPD at 225 PSI 8 x 40 inch Membranes

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CPA6-LD CPA Hydranautics Nitto 8,000 GPD at 225 PSI 8 x 40 inch Membranes

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Hydranautics CPA6-LD High Rejection RO Membrane

 

The Hydranautics (Nitto) CPA6-LD represents the fifth generation of the Composite Polyamide (CPA) family, widely considered the industry standard for high-purity brackish water treatment. Engineered for applications where water quality is non-negotiable, this 8" x 40" element provides the highest salt rejection in the CPA line, reaching a nominal 99.75% to 99.8%. It is the preferred choice for municipal drinking water plants, semiconductor fabrication, and boiler feed water systems that require the aggressive removal of silica, nitrates, and total dissolved solids (TDS).

The "LD" designation stands for Low Differential Pressure technology. This membrane features a patented 34 mil feed spacer and enhanced leaf geometry designed to minimize colloidal fouling and simplify the cleaning process. By reducing the rate of pressure drop across the pressure vessel, the CPA6-LD ensures longer intervals between cleanings and more consistent performance in challenging feed water conditions. While it operates at slightly higher feed pressures than the energy-saving ESPA series, its superior rejection capabilities make it an essential component for critical high-purity industrial processes.


SPECIFICATION DETAILS
Model Number CPA6-LD
Manufacturer Hydranautics (Nitto)
Membrane Type High Rejection Brackish Water
Technology Low Differential Pressure (LD™)
Permeate Flow Rate 8,000 GPD (30.3 m³/d)
Nominal Salt Rejection 99.75% – 99.8%
Minimum Salt Rejection 99.6%
Active Surface Area 400 ft² (37.2 m²)
Test Pressure 225 PSI (1.55 MPa)
Max Operating Pressure 600 PSI (4.14 MPa)
Dimensions 7.89" Diameter x 40" Length
Feed Spacer Thickness 34 mil
Max Operating Temp 113°F (45°C)

 

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