MemTeck™ BWRO 4040 & 8040
Brackish Water Reverse Osmosis Membranes (BWRO)
(Feed Salinity up to 3,000 ppm, 225 psi)
Test Conditions: 2,000 ppm NaCl, 225 psi (10 bar), pH 8, 77°F (25°C), 15% Recovery
Key Features & Applications
Key Features
-
Low Operating Pressure
Optimized to operate at reduced feed pressures, significantly lowering energy consumption.
-
High Permeate Flow
Ensures excellent water productivity and maximized system output.
-
Superior Salt Rejection (Up to 99.5%)
BWRO membrane elements achieve outstanding salt rejection at feed salinity up to 3,000 ppm, while maintaining high productivity even at lower operating pressures.
-
Advanced Feed Spacer Technology
Incorporates proprietary feed spacer design to minimize pressure drop and enhance long-term operational stability.
-
Enhanced Anti-Fouling Performance
Engineered to reduce fouling potential, resulting in: Lower chemical cleaning requirements, Reduced operational costs, Decreased energy consumption, and Extended membrane service life.
Applications
- Brackish Water Treatment: Efficient desalination with high salt rejection and optimized energy consumption.
- Surface Water Treatment: Stable and consistent performance under variable feed water conditions.
- Municipal Wastewater Reuse: Supports sustainable water recovery and reuse programs with dependable permeate quality.
- Dairy Processing Applications: Reliable performance for process water treatment and product-related water management.
- Domestic Water Supply Systems: Provides safe, high-quality potable water with energy-efficient operation.
Element Dimensions – inches (mm)
1 inch = 25.4 mm
Typical Properties
| Product |
A |
B |
C |
D |
| BWRO 4040 |
40.0 (1,016) |
1.05 (26.7) |
0.75 (19) |
3.9 (99) |
| BWRO 8040 |
40.0 (1,016) |
1.19 (30.2) |
1.25 (28.6) |
7.9 (200) |
1. Test conditions: 2,000 ppm NaCl, 225 psi (10 bar), pH 8, 77°F (25°C), 15% recovery.
2. Minimum salt rejection is 99%.
3. Individual elements may have different permeate flows by +/-15%.
| Product |
Active Membrane Area ft² (m²) |
Permeate Flow Rate GPD (m³/d) |
Stabilized Salt Rejection % |
Feed Spacer mil |
| BWRO 4040 |
100 (9.2) |
2,600 (11) |
99.5 |
28 |
| BWRO 8040 |
400 (37.2) |
11,000 (42) |
99.5 |
28 |
Operation Specifications and Cleaning Limits
| Membrane Type |
BWRO 4040 |
BWRO 8040 |
| Membrane Materials |
Polyamide Thin-Film Composite |
| Maximum Operating Temperature |
113°F (45°C) |
113°F (45°C) |
| Maximum Operating Pressure |
600 psi (41 bar) |
600 psi (41 bar) |
| Maximum Feed Flow Rate |
16 gpm (3.6 m³/h) |
75 gpm (17 m³/h) |
| Maximum Pressure Drop |
15 psig (1.0 bar) |
15 psig (1.0 bar) |
| pH Range |
2-11 |
2-11 |
| Maximum Feed Silt Density Index (SDI) |
SDI 5 |
SDI 5 |
| Free Chlorine Tolerance |
< 0.1 ppm |
< 0.1 ppm |
1. Over pH 10, the maximum continuous temperature is 95°F (35°C).
2. In certain conditions, free chlorine and other oxidizing agents can cause premature membrane failure. Pretreatment prior to membrane exposure is recommended to prevent oxidation damage, since oxidation damage is not covered by warranty.
General Information
1. After initial wetting, keep elements moist at all times.
2. The limited warranty will be null and void if the operating limits and guidelines are not strictly followed.
3. For the purpose of preventing biological growth during prolonged system operation shutdowns, membrane elements should be immersed in a preservative solution.
4. The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
5. The maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar).
6. Always avoid static backpressure on the permeate side.
7. The permeate obtained from the first hour of operation should be discarded.
8. Make sure there are no abrupt changes in pressure or crossflow.
9. During start-up, shutdown, cleaning, or other sequences, spiral elements should be protected from damage. It is recommended to gradually transition from a standstill to an operating state during startup:
10. The feed pressure should be gradually increased over a 30-60-minute period.
11. The crossflow velocity should be gradually increased over 15-20 seconds to reach the set operating point.
12. It is crucial that the system is designed and operated correctly in order to reduce cysts and pathogens effectively.
13. The permeate obtained from the first hour of operation should be discarded.
Important Information
14. To prevent membrane damage due to overfeeding or hydraulic shock, it is essential to start up reverse osmosis water treatment systems properly. As a result of following the proper start-up sequence, system water quality and productivity goals can also be achieved.
15. Pretreatment of the membrane, loading of the membrane elements, instrument calibration, and other system checks should be completed before starting the system.
Regulatory Note
Please check the application status of this product before using or selling it; some countries may restrict the use of this product in drinking water.
Disclaimer
Herein, all information is provided purely for informational purposes. It is important to note that this is general information and that it may differ depending on actual conditions. As a customer, you are responsible for making sure that the products and information contained in this document are appropriate for use by you and that your workplace and disposal practices comply with applicable laws. There may be geographic restrictions on the sale of the product shown in this literature. It is possible that the claims made have not been approved for use in all countries.
In this document, operating conditions are intended to extend product lifespan and/or improve product performance, but they will ultimately depend on actual circumstances and are never a guarantee that any specific results will be achieved. Physical properties may vary depending on certain conditions. This document is provided without any obligation or liability on the part of Memteck. Unless otherwise stated, "Memteck" and "Company" refer to the DuPont legal entity selling the products to Customer.
