SW30 8040
Filtration accuracy: 0.0001 micron
Service life: 1-2 years
Salt rejection rate: 99.5%
PH range: 2-11
Maximum water inlet temperature: 45°C
SW30 8040 (Seawater Reverse Osmosis Membrane) is an 8.0" x 40" membrane element designed for efficient desalination. It delivers high-quality RO water with a maximum capacity of 6,000 gallons per day and a 10% recovery rate. Operating within a feed pressure range of 800 psi to 1,015 psi, this membrane boasts an impressive 99.1% salt rejection rate.
The SW30-8040 membrane is specifically crafted for medium-sized desalination systems that produce less than 10 gallons per minute (2,300 liters per hour) of permeate. It excels in providing superior water output from seawater while maintaining exceptional salt rejection. Reliable performance is achieved through enhanced membrane technology and precision element fabrication. Additionally, they can be operated at lower pressure, reducing pump size, costs, and overall expenses.
Key Advantages at a Glance
✅ Ultra-High Rejection: 99.8% salt removal (vs. 98% of standard membranes).
✅ High Flow Rate: 10,000 GPD (37,850 L/day) for large industrial needs.
✅ Anti-Fouling Design: Resists scaling from calcium/magnesium (longer lifespan).
✅ NSF-Certified: Safe for drinking water (food/brewery use).
SW Membrane specification
| Model | SW30 8040 |
| Dimensions(Diameter x Length, inches) | 8.0 x 40 inches(actual 7.9 x 40) |
| Stabilized Salt Rejection, Range(min-max%) | 98.6% - 99.1% |
| Permeate Flow Rate | 6,000 gpd (22.7 m³/day) |
| Maximum Feed Flow Rate | 60 gpm (14 m³/h) |
| Maximum Feed Turbidity | 1 NTU |
| Maximum Operating Temperature(°F) | 113°F (45°C) |
| Applied Pressure(psi) | 800 psi (55 bar) |
| Maximum Operating Pressure(psi) | 1,015 psi (69 bar) |
| Maximum Pressure Drop(psi) | 15 psi (1.0 bar) |
| pH Range, Continuous Operation | 2 - 11 |
| pH Range, Short-Term Cleaning | 1 - 13 |
| Maximum Feed Silt Density Index(SDI) | 5 SDI |
| Free Chlorine Tolerance(ppm) | < 0.1 ppm |
| Membrane Style | Drop-in Element |
| Membrane Material | Polyamide Thin-Film Composite |
| Feed Spacer | 28 mil |
| Active Area | 300 ft² (28.0 m²) |
| Outer Wrap | Hard fiberglass outer shell |
Note: The above benchmark values are based on the following test conditions: 32,000 ppm NaCl, 800 psi (5.5 MPa), 77F (25C), pH 8, and 10% recovery. Permeate flows for individual elements may vary +/-15%.
Why SW30-8040 Over Competitors?
Most RO membranes struggle with:
🔴 Low Rejection: Only 98% salt removal → more post-treatment needed.
🔴 Fouling: Scaling from hard water → frequent cleaning/shutdowns.
SW30-8040 solves these:
🟢 TFC Technology: Thin-film composite membrane for tighter salt exclusion.
🟢 Enhanced Surface: Smoother texture reduces particle adhesion (fouling rate ↓40%).
Where It Works Best
Perfect for these high-demand applications:
💧 Brackish Water Desalination: Converts salty groundwater to drinking water (e.g., rural communities).
💧 Industrial Wastewater Reuse: Treats metal/chemical wastewater (textile/petrochemical plants).
💧 Power Plant Cooling: Purifies water for boiler feed (prevents scale in pipes).
💧 Food & Beverage: NSF-certified for brewery/packing plant process water.
FAQ
What's the difference between SW30-8040 and SW30HR-8040?
A: SW30-8040 has 99.8% rejection (standard for brackish water). SW30HR-8040 offers 99.9% (for higher-salinity water, like 10,000+ ppm TDS).
How long does it last?
A: 3-5 years with proper pre-treatment (carbon filter + anti-scalant). High-fouling water (e.g., 500+ ppm hardness) may reduce lifespan to 2-3 years.
What pre-treatment is needed?
A: Must include:
- 5-micron sediment filter (prevents membrane plugging).
- Activated carbon (removes chlorine <0.1 ppm).
- Anti-scalant (prevents calcium carbonate scaling).
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