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Pure water membrane BW30-4040 Dow 4040 bitter salt water reverse osmosis membrane element Dow 4040 reverse osmosis performance characteristics: Dow bi
Product details
Pure water membrane BW30-4040
Dow 4040 Bitter Saltwaterreverse osmosisElement
Dow 4040 Reverse OsmosisPerformance characteristics：
Dow's brackish water membrane components provide a reliable solution for brackish water light industrial water treatment systems. Stable and excellent system performance.
The Dow LE-4040 can operate at ultra-low pressure, with low energy consumption and lower operating costs, demonstrating extremely high overall system performance.
The standing committee member of Dow Reverse Osmosis BW30-4040 is currently recognized as the most stable and high-quality reverse osmosis membrane component in the industry. Suitable for direct drinking water treatment and certified by the US NSF hygiene certification
dowPure water membraneBW30-2540 is specifically designed for small-scale pure water systems with a water production capacity of less than 0.2M3/H, but with extremely high requirements. Can be used for laboratory pure water systems.
The desalination rate of Dow high-pressure reverse osmosis membrane LC HR-4040 is extremely high, and the water quality is good. It is made of Dow's most advanced RO membrane material roll.
The Dow low-pressure reverse osmosis membrane LC LE-4040 has extremely low energy consumption, saving operating costs and reducing system pressure for pure water systems.
Specification parameters of Dow 4040 reverse osmosis membrane：
| model | Membrane number | Effective membrane area M2 | Test pressure in psi | Water production rate m3/d | Desalination rate |
| LE-4040 | 275173 | 7.2 | 150 | 9.5 | 99% |
| BW30-4040 | 80783 | 7.2 | 225 | 9.1 | 99.5% |
| BW30-2540 | 80766 | 2.6 | 225 | 3.2 | 99.5% |
| LCHR-4040 | 343771 | 8.7 | 225 | 11 | 99.7% |
| LCLE-4040 | 356603 | 8.7 | 225 | 9.5 | 99.2% |
2. The flow rate of a single component may vary, but it will not be lower than the listed values by more than 15%.
When product quality improves, there may be slight changes in product specifications.
4. The effective membrane area will be within plus or minus 3% of the given value.
5. LE-4040 was once named BW30LE-4040
Dow reverse osmosis membrane4040 size specification：
| Membrane model | Size "(mm) | |||
| A | B | C | C | |
| LE-4040 | 40(1016) | 1.05(26.7) | 0.75(19) | 3.9(99) |
| BW30-2540 | 40(1016) | 1.19(26.7) | 0.75(19) | 3.9(99) |
| BW30-4040 | 40(1016) | 1.05(26.7) | 0.75(19) | 2.4(61) |
| LC LE-4040 | 40(1016) | 1.05(25.7) | 0.75(19) | 3.9(99) |
| LC HR-4040 | 40(1016) | 1.05(25.7) | 0.75(19) | 3.9(99) |
The above model 4040 membrane element can replace any type of 4-inch reverse osmosis membrane element, using a standard 4-inch pressure vessel membrane shell.
Dow film BW30-4040 operating limit value:
- Type of membrane: Polyamide composite membrane
- Maximum operating temperature: 45oC(113oF)
- Maximum operating pressure: 600psi (41bar)
- Maximum pressure difference: 15 psi (1.0 bar)
- Continuous operation pH rangea……………………………2－11
- Short term cleaning pH range (30 minutes)b…………………1－12
- Maximum feedwater flow rate: 70 gpm (3.6 m)3/h)
- Maximum Water Pollution Index SDI 5
- Maximum turbidity of feedwater: 1NTU
- Free chlorine tolerancec…………………………………… < 0.1ppm
bPlease refer to the cleaning guidelines in document number 609-23010;
cUnder certain conditions, the presence of free chlorine and other oxidants in the incoming water can cause serious membrane damage. As oxidation damage is not covered by the product warranty, FilmTec recommends removing residual free chlorine in the pre-treatment before the membrane. Please refer to technical data 609-22010 for further assistance.
Dow Membrane Component Maintenanceimportant information：
It is necessary to correctly start the reverse osmosis water treatment system to prevent damage to the membrane components caused by water flow or hydraulic shock when the membrane system is ready for operation. Following the correct startup sequence helps ensure that system operating parameters comply with design specifications, thereby achieving the established design goals for system water quality and quantity. Before the initial startup program of the membrane system, the pre-treatment system debugging, membrane component loading, instrument calibration, and other system checks of the membrane system should be completed. For more information, please refer to the application literature titled "Startup Sequence".
oltremareRO reverse osmosis systemoperation guide：
During startup, shutdown, cleaning, or other processes, to prevent potential membrane damage, any sudden pressure or cross flow rate changes in the coiled components should be avoided. During the startup process, we recommend gradually transitioning from a static state to an operational state according to the following procedure:
The water supply pressure should gradually increase within the time range of 30-60 seconds.
The designed cross flow velocity value should gradually reach within 15-20 seconds.
The product water should be drained within the first hour.
Storage of Dow Membrane Componentsgeneral information：
Once the component is wetted, it should always be kept moist.
If the user does not strictly follow the operating limits and guidelines set in this specification, the limited warranty will be invalidated.
When the system is shut down for a long time, it is recommended to immerse the membrane components in a protective solution to prevent microbial growth. The standard storage solution contains 1.5% by weight of sodium bisulfite (food grade).
Users should be responsible for the impact of using incompatible chemicals and lubricants on components.
A single pressure vessel? The maximum allowable pressure drop is 50psi (3.4 bar).
Always avoid creating back pressure on the water side of the product.
Keywords: Dow membrane, Dow RO reverse osmosis membrane, Dow pure water membrane parameters
DOWDow PurewaterRO reverse osmosisElement/Brackish Water
8.0 'x 40' 4.0 'x 40' 2.5 'x 40' Other
BW30HR-440i BW30-4040 BW30-2540 TW30-4021
BW30-440i TW30-4040 TW30-2540 TW30-4014
BW30-400/34i LC HR-4040 TW30-2521
BW30-400 TW30-2514
BW30-365 TW30-2026
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