Brackish High Rejection
When high performance counts, CPA (Composite Polyamide) membranes from Hydranautics set the standard for RO membrane elements. CPA membranes provide the highest salt rejection rates available - every element on every order for every customer.
CPA2 – “The Workhorse” Most widely used with consistent performance
CPA3 – Best combination of productivity and salt rejection available
| Model No. | Size (Dia.”× Length”) |
Flow Rate | Test Pressure (psi) | Nominal Salt Rejection (%) | Minimum Salt Rejection (%) | |
| gpd | m³/d | |||||
| CPA2-4040 | 4” × 40” | 2,250 | 8.5 | 225 | 99.5 | 99.2 |
| CPA2 | 8” x 40” | 10,000 | 37.9 | 225 | 99.7 | 99.5 |
| CPA3 | 8” × 40” | 11,000 | 41.6 | 225 | 99.7 | 99.6 |
CPA5-LD Series – New technology minimizing bio-fouling and colloidal fouling and enhancing cleanability.
Where ultrahigh purity water is required under difficult feedwater conditions, the CPA5-LD gives the most desirable combination of high rejection and high flow. For industries such as power, semiconductor, food and beverage, where high purity water is critical to operations, CPA5-LD gives you the most desirable combination of performance and efficiency. CPA5-LD helps reduce RO system power consumption and the membrane resistance to biological and colloidal fouling helps reduce the number of cleanings required, lowering the overall cost of your operation.
| Model No. | Size (Dia.”× Length”) |
Flow Rate | Test Pressure (psi) | Nominal Salt Rejection (%) | Minimum Salt Rejection (%) | |
| gpd | m³/d | |||||
| CPA5-LD-4040 | 4” × 40” | 2,100 | 7.95 | 225 | 99.7 | 99.5 |
| CPA5-LD | 8” × 40” | 11,000 | 41.6 | 225 | 99.7 | 99.6 |
| CPA5MAX | 8” × 40” | 12,000 | 45.4 | 225 | 99.7 | 99.6 |
Please see product specification sheets for the test conditions under which the stated performance are based, and exact membrane element dimensions.
- Up to 99.7% Nominal Rejection
- High TOC, silica and hardness rejection
- High permeate flow
- High rejection of boron – up to 92%
- Lowest biological and colloidal fouling
- Greater tolerance to high pH cleanings
- Lower energy consumption
- Enhanced Membrane Chemistry for Increased Chemical Resistance
- Innovative Spacer Design to Minimize Trapping of Small Colloidal Particles
- HYDRAblock Technology Providing Biostatic Properties to Minimize Proliferation of Biological Fouling
- Proprietary Vented Seal Carrier to Eliminate Pressure-Shock Damage During System Startup
- Desalting of Well Waters – Municipal Drinking Water
- Reducing TDS Prior to Ion Exchange
- Ultrapure Water For Semiconductor Manufacture
- Boiler makeup water for power generation
- Ultrapure water for pharmaceutical industries
- Industrial waste water recycling
- Zero liquid discharge/HERO process