MemTeck™ BWRO-FR Series 4040 & 8040
Brackish Water-Fouling Resistance (BWFR) RO Membranes
(Feed Salinity up to 7,000 ppm, 350 psig)
Test Conditions: 7,000 ppm NaCl, 350 psig (23.8 bar), pH 8, 77°F (25°C), 15% Recovery
Key Features & Applications
Key Features
-
Low Operating Pressure
Designed to operate efficiently at reduced feed pressures, helping lower overall energy costs.
-
High Permeate Flow
Ensures excellent water productivity and optimized system output.
-
Outstanding Salt Rejection (99.5%)
The BWFR membrane elements provide superior salt rejection at feed salinity up to 7,000 ppm, while maintaining high productivity even at lower operating pressures.
-
Advanced Feed Spacer Technology
Incorporates proprietary feed spacer design to reduce pressure drop, enhance flow distribution, and ensure stable long-term performance.
-
Enhanced Anti-Fouling Performance
Optimized membrane surface and design result in: Reduced chemical cleaning frequency, lower chemical consumption, decreased energy usage, and extended membrane service life.
Applications
- Highly Saline Brackish Water Treatment: Efficient operation at elevated salinity levels with excellent permeate quality.
- Surface Water Treatment: Stable performance under variable raw water conditions.
- Municipal Wastewater Reuse: Supports sustainable water recovery and reuse initiatives with dependable separation efficiency.
- Dairy Processing Applications: Optimized for process water treatment and concentration requirements.
- Pharmaceutical Water Systems: Provides consistent, high-purity water to meet strict quality standards.
- Oil & Gas Industry Applications: Engineered for durability and stable operation in demanding industrial environments.
Element Dimensions – inches (mm)
1 inch = 25.4 mm
Element Dimensions Reference Table
| Product |
A |
B |
C |
D |
| BWRO-FR-4040 |
40.0 (1,016) |
1.05 (26.7) |
0.75 (19) |
3.9 (99) |
| BWRO-FR-8040 |
40.0 (1,016) |
1.19 (30.2) |
1.25 (28.6) |
7.9 (200) |
Typical Properties
| Product |
Active Membrane Area ft² (m²) |
Permeate Flow Rate GPD (m³/d) |
Stabilized Salt Rejection % |
Feed Spacer mil |
| BWRO-FR-4040 |
100 (9.2) |
2,600 (9.8) |
99.5 |
28 |
| BWRO-FR-8040 |
400 (37.2) |
10,000 (38) |
99.5 |
28 |
Test conditions: 7,000 ppm NaCl, 350 psig (23.8 bar), pH 8, 77°F (25°C), 15% recovery.
Minimum salt rejection: 99.1%.
*Individual elements may have different permeating flows by +/-15%.
Operation Specifications and Cleaning Limits
| Membrane Type / Specification Parameter |
BWRO-FR-4040 |
BWRO-FR-8040 |
| Membrane Materials |
Polyamide Thin-Film Composite |
| Maximum Operating Temperature |
113°F (45°C)a |
113°F (45°C)a |
| 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 |
a. Over pH 10, the maximum continuous temperature is 95°F (35°C).
b. 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 & Operational Guidelines
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.
