MEMTECK
Membrane Technology Solutions
MemTeck™ SWRO 440 8040
Sea Water Reverse Osmosis (SWRO-440) Membranes
(Feed Salinity ~32,000 ppm, 800 psi)
Sea Water Reverse Osmosis (SWRO-440) Membranes
(Feed Salinity ~32,000 ppm, 800 psi)
Test Conditions: 32,000 ppm NaCl, 800 psig (55 bar), pH 8, 77°F (25°C), 12% Recovery
Key Features & Applications
Key Features
-
High Permeate Flow (High Flux)
Engineered to deliver high productivity for increased water production. -
Excellent Salt Rejection (99.8%)
Maintains outstanding salt rejection performance at typical seawater salinity (~32,000 ppm TDS). -
High Productivity at Lower Feed Pressures
Operates effectively at lower feed pressures, directly improving overall system efficiency. -
Advanced Proprietary Feed-Spacer Technology
Minimizes pressure drop across the element, enhances feed flow distribution, and ensures long-term stable performance. -
Superior Anti-Fouling Performance
Ensures long-term stable performance with reduced scaling and fouling tendency, lower chemical cleaning requirements, and extended membrane service life.
Applications
- Seawater desalination
- High-salinity brackish water treatment
- High-salinity surface water treatment
- High-salinity municipal wastewater reuse
- Dairy industry process water and wastewater treatment
- Pharmaceutical industry purified water production
- Oil and gas produced water treatment
- Cement industry process water treatment and reuse
- Steel industry wastewater treatment and recycling
Element Dimensions
Dimensions – inches (mm)
1 inch = 25.4 mm
1 inch = 25.4 mm
Element Dimensions Reference Table
| Product | A | B | C | D |
|---|---|---|---|---|
| SWRO-8040 | 40.0 (1,016) | 1.19 (30.2) | 1.25 (28.6) | 7.9 (200) |
1. Test conditions: 32,000 ppm NaCl, 800 psig (55 bar), pH 8, 77°F (25°C), 12% recovery.
2. Minimum salt rejection is 99.3%.
3. Individual elements may have different permeating flows by +/-15%.
2. Minimum salt rejection is 99.3%.
3. Individual elements may have different permeating flows by +/-15%.
Typical Properties
| Product | Active Membrane Area ft² (m²) | Permeate Flow Rate GPD (m³/d) | Stabilized Salt Rejection % | Feed Spacer mil |
|---|---|---|---|---|
| SWRO 8040 | 400 (37.2) | 10,000 (38) | 99.8 | 34 |
Operation Specifications and Cleaning Limits
| Specification | SWRO-8040 |
|---|---|
| Membrane Materials | Polyamide Thin-Film Composite |
| Maximum Operating Temperature | 113°F (45°C)a |
| Maximum Operating Pressure | 1200 psi (83 bar) |
| Maximum Feed Flow Rate | 75 gpm (17 m³/h) |
| Maximum Pressure Drop | 15 psig (1.0 bar) |
| pH Range | 2 - 11 |
| Maximum Feed Silt Density Index (SDI) | SDI 5 |
| Free Chlorine Tolerance | < 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.
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
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.
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.
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.
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.
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