Nitto Hydranautics CPA3-LD 4040 RO Membrane 4×40 Inch High Rejection Brackish Water Membrane

The Nitto Hydranautics CPA3-LD 4040 RO Membrane is a high-rejection 4 × 40 inch spiral-wound brackish water reverse osmosis membrane designed for commercial, municipal and industrial water purification applications. Its composite polyamide membrane technology provides approximately 99.7% nominal salt rejection, making it suitable for applications requiring effective dissolved salt and contaminant reduction.

The CPA3-LD-4040 features low-differential feed spacer technology, designed to help reduce fouling and cleaning frequency when operated under appropriate water-treatment conditions.

Key Specifications

• Brand: Nitto Hydranautics
• Model: CPA3-LD-4040
• Type: Brackish Water RO Membrane
• Size: 4 × 40 Inch
• Salt Rejection: Approximately 99.7% nominal
• Membrane Type: Spiral-Wound Composite Polyamide (CPA)
• Active Membrane Area: 400 ft² (37.2 m²)*
• Feed Spacer: Low-Differential (LD)
• Accessories Included: Brine seal, interconnector and O-rings

Applications

• Municipal drinking water treatment
• Well water desalination
• Commercial RO systems
• Boiler makeup water
• High-purity industrial water treatment
• Brackish and high-TDS water purification

Why Choose CPA3-LD-4040?

The Hydranautics CPA3-LD-4040 is designed for RO systems where high salt rejection and reliable water purification performance are required. Its standard 4 × 40 inch configuration makes it suitable for compatible commercial and industrial membrane housings.

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