E-MEM 4040 Industrial RO Membrane – High-Flux 4″×40″ Element

The E-MEM 4040 Industrial RO Membrane is a premium-grade aromatic polyamide composite element designed for large-scale water purification systems. It offers high water flux at lower operating pressures, making it both efficient and cost-effective.Typically used in industrial and commercial RO plants, this membrane supports applications such as boiler-feed water, bottled water production, surface and groundwater desalination, and more.

Key Features

• High Salt Rejection: Delivers rejection rates up to 99.5% under test conditions (2000 ppm NaCl) for model BW-4040/4040 series.
• Extra Low Pressure Operation: Reduced feed pressure requirements compared to standard membranes—leading to lower pump energy and infrastructure cost.
• Large Active Area: Approximately 8.4 m² (≈90.4 ft²) membrane area in the 4040 size, supporting high production volumes.
• Wide Application Range: Suitable for surface water, municipal feed, groundwater, brackish water (salt content <8000 ppm), and industrial water purification.
• Robust Operating Conditions: Max operating pressure ≈4.14 MPa (600 psi), max feed water temperature up to 45 °C, feed free chlorine concentration <0.1 ppm.

Technical Specifications

• Model: 4040 size (4″ diameter × 40″ length)
• Active Membrane Area: approx. 90.4 ft² (8.4 m²)
• Typical Permeate Flow: ~2400 GPD (≈9.1 m³/day) under 2000 ppm NaCl test condition for BW-4040.
• Max Operating Pressure: 4.14 MPa (600 psi)
• Max Feed Temperature: 45 °C
• Maximum Feed SDI (Silt Density Index): ≤ 5
• Free Chlorine Concentration: <0.1 ppm recommended
• pH Range (Continuous Use): 3-10; (Cleaning): 2-12

Why Choose the E-MEM 4040 Industrial RO Membrane?

If you manage a commercial or industrial water-treatment system, the E-MEM 4040 offers a standout balance of performance, efficiency, and cost-effectiveness. Because it operates at lower pressures while maintaining high flux and salt rejection, you incur lower pump energy and infrastructure costs. Moreover, its compatibility with a wide range of feed-water types—from municipal to low-salinity brackish—makes it flexible for many system designs. In addition, the large active area ensures robust production capacity, and you’ll benefit from reduced downtime and consistent water quality.

Installation & Maintenance Tips

1. Pre-treatment is key: Ensure feed water SDI ≤ 5 and free-chlorine <0.1 ppm.
2. Start-up Flush: When new, flush the membrane at lower pressure for 15-25 minutes, then at full design pressure for 60-90 minutes—discharge the initial permeate/concentrate.
3. Monitor differential pressure and permeate conductance: Increases in either may indicate fouling or scaling.
4. Cleaning schedule: Clean based on manufacturer guidelines; use approved chemicals and check pH limits (2-12 for chemical cleaning).
5. Storage of spare elements: Keep wet, or soak in 1.0% sodium bisulfite solution if prolonged storage is required.