Hydranautics Nitto – RO Membranes – Composite Polyamide – CPA6 – CPA6-LD

We ship to
Please login or register to see downloads


Ultrapure water is essential in several industrial applications. CPA RO membranes are regarded as the industry standard for all critical high purity applications – from pharmaceutical to power industry.

CPA lines of spiral-wound RO membranes are available in a variety of sizes and deliver unmatched performance with the highest salt rejection rates for brackish water applications. High throughput, efficiency and cost-effectiveness make CPA membranes the best high-rejection brackish water RO membranes in the industry.

Because of its exceptionally high salt rejection, CPA membranes are used in power generation, pharmaceutical, electronics and semiconductor industry.

CPA6-LD is the fifth generation CPA brackish water RO membrane and has the best rejection of all of its predecessors at 99.8%. This 400 sq. ft. membrane operates at a higher feed pressure than CPA5-LD but it has the highest rejection in the CPA family.

CPA6-LD membranes are designed with Low Differential Pressure LD Technology designed to minimize colloidal fouling. They have 37.0 m2 (400 ft2) membrane area. Using CPA6-LD results in cost saving while still getting a high rejection from membranes.

CPA6-LD and CPA6-MAX membranes are available in diameters of 8.0 inches only.

CPA6-MAX has the same high rejection membrane of CPA6-LD, but features a 10% increase in membrane area at 440 sq.ft. CPA6 MAX is a preferred choice for feed waters of low turbidity and silt density index such as brackish well waters.





Looking for downloads for this product? Follow the two simple steps below.

Step 1
LoginorCreate Account
Step 2

View downloads!



Manufacturer Hydranautics Nitto
Series Composite Polyamide
Model Number CPA6
Part Number CPA6-LD
Description Diameter - 8"
Length - 40"
Permeate Flow - 8,000 gpd
Salt Rejection - 99.75%
Test Conditions -
1500 ppm NaCl solution
225 psig Applied Pressure
77 F Operating Temperature
15% Permeate Recovery
6.5 - 7.0 pH Range

Click To Schedule a Service Call

Click To Schedule a Sales Call

Call for a FREE Quote Today

(855) 787-4200