Hydranautics CPA7-LD Membrane

CPA7-LD is the sixth generation CPA high rejection brackish water RO membrane and has the highest salt rejection at 99.8%.

CPA7-LD membranes use a patented 34 mil thickness feed spacer that increases effectiveness of membrane cleaning.

As a result, the CPA7-LD membrane does not need to be cleaned frequently – thus reducing treatment cost – while offering extreme durability and consistent performance.

Where high purity water is required under difficult conditions, CPA7-LD membrane provides the best combination of best permeate quality and lower feed pressure in brackish water RO membranes.

CPA7-LD membrane is useful in power generation, electronics, semiconductor, pharmaceutical and food & beverage industries.

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CPA7-LD Specifications:

• Permeate Flow: 11,500 gpd (43.5 m³/d)
• Salt Rejection: 99.8% (99.7% minimum)
• Configuration: Low Fouling Spiral Wound
• Membrane Polymer: Composite Polyamide
• Membrane Active Area: 400 ft² (37.2 m²)
• Feed Spacer: 34 mil (0.864 mm)

The stated performance is initial (data taken after 30 minutes of operation), based on the following conditions:

• 1500 ppm NaCl solution
• 225 psi (1.55 MPa) Applied Pressure
• 77 °F (25 °C) Operating Temperature
• 15% Permeate Recovery
• 6.5–7.0 pH Range

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Standard Operating Limits:

• Maximum Applied Pressure: 600 psig (4.14 MPa)
• Maximum Chlorine Concentration: < 0.1 ppm
• Maximum Operating Temperature: 113 °F (45 °C)
• pH Range, Continuous (Cleaning): 2–11 (1–13)
• Maximum Feedwater Turbidity: 1.0 NTU
• Maximum Feedwater SDI (15 mins.): 5.0
• Maximum Feed Flow: 75 gpm (17.0 m³/h)
• Maximum Pressure Drop for Each Element: 15 psi

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[custom-usage]

• Municipal/Industrial Surface and Wastewaters
• Difficult Feedwaters Requiring Significant Pretreatment

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