CPA Series: CPA2-4040 Brackish Water RO Membrane

The technical parameters of CPA2-4040 are precisely optimized to fully reflect its core characteristics of high desalination rate, strong adaptability to brackish water and high versatility, and the core parameters are as follows: the membrane material is composite polyamide, non-toxic and harmless, with good chemical stability and anti-pollution performance, and the service life can reach 3-5 years; the nominal desalination rate is ≥99.7%, the minimum desalination rate is ≥99.5%, the organic matter rejection rate is ≥98.5%, the SiO2 rejection rate is ≥98%, and the produced water meets national industrial and drinking water standards; the recommended operating pressure is 0.8-1.2MPa, which is suitable for brackish water treatment systems and realizes low energy consumption; the operating temperature is 5-45℃, the inlet water pH value is 2-11 (cleaning pH value is 1-12), the inlet water Silt Density Index (SDI) is ≤5, and the inlet water turbidity is ≤1NTU; under standard conditions (25℃, 1.0MPa), the water production flux is 26-36m³/(m²·d); the single membrane recovery rate is 18%; the physical size is 4040 standard size, the outer diameter × length is 3.88×40 inches, the dry weight is 5.5kg, and the effective membrane area is 8.9㎡; the cleaning cycle is 30-40 days, and the flux recovery rate after cleaning is ≥96%; the deviation range of water production is within ±15%, and the deviation range of effective membrane area is within ±3%.

4. Product Advantages

The core advantages of CPA2-4040 are concentrated in classic high desalination rate, strong adaptability to brackish water and high versatility, which accurately solve the key pain points of brackish water treatment. First, classic high desalination rate, the nominal desalination rate is as high as 99.7%, which can effectively remove salts, heavy metals and other harmful substances in brackish water, ensuring stable and qualified produced water, and has excellent ability to remove SiO2 and TOC. Second, strong adaptability to brackish water, it can adapt to brackish water with different salt contents (1000-10000mg/L) and impurity types, and can maintain stable performance even in water with slight fluctuations in water quality, which is in line with the characteristics of complex brackish water quality in actual projects. Third, high versatility, the standard 4040 design is compatible with most conventional water treatment systems, and can be applied to multiple scenarios such as brackish water desalination, groundwater purification and industrial process water treatment, reducing the cost of equipment replacement and transformation. Fourth, stable performance and long service life, the mature composite polyamide material and optimized spiral wound structure reduce membrane pollution, extend the cleaning cycle, and ensure stable operation for a long time. Fifth, convenient installation and maintenance, the modular design is easy to install and replace, and each membrane element is equipped with a concentrated water sealing ring and connection adapter, which can be operated without professional technical personnel, saving maintenance time and cost.

5. Application Procedures

Combined with years of practical experience, the application procedures of CPA2-4040 are simple and standardized, which is convenient for users to operate, and special attention should be paid to water quality adaptation during operation. Pre-installation preparation: Check the integrity of the membrane element, confirm that the surface and sealing ring are not damaged, and check that the protective solution is intact; clean the system pipeline, remove impurities such as rust and sediment, and prepare installation tools and monitoring instruments (especially salt content and pH monitors). Membrane element installation: Install it into the pressure vessel according to the instructions, ensure that the connection is tight and the direction is correct, the water inlet and outlet cannot be reversed, and install the sealing ring to prevent water leakage. System commissioning: Turn on the power and water source, adjust the pressure to 1.0MPa, adjust the flow rate to the recommended value, run the system for 30-60 minutes, and check whether the desalination rate, flux and other parameters are normal. Normal operation: Regularly monitor the pressure, flux, desalination rate and water quality, and keep records. If the pressure increases by 0.2MPa or the flux decreases by 20%, clean it in time. Membrane cleaning: According to the pollution type, prepare a special cleaning solution (acidic or alkaline), circulate and clean at 25-35℃ for 30-60 minutes, rinse with clean water until neutral, then restart. Daily maintenance: After the system is shut down, rinse the membrane element for 5-10 minutes, regularly check the sealing ring, and properly store it in the protective solution when not in use for a long time; avoid long-term contact with strong oxidants such as residual chlorine to prevent membrane damage.

6. Quality Standards

CPA2-4040 strictly follows the dual international and domestic quality standards to ensure reliable and stable product performance, especially meeting the requirements of brackish water treatment. Internationally, it follows the ISO 9001 quality management system, ASTM D4516 test method and ISO 20466:2024 performance classification guidelines; domestically, it complies with GB/T 30307-2013 "Reverse Osmosis Membrane Elements for Water Treatment", GB/T 5749-2022 "Sanitary Standards for Drinking Water" and HJ/T 270-2006 "Technical Requirements for Environmental Protection Products - Reverse Osmosis Water Treatment Equipment". Core quality requirements: The membrane material meets food-grade standards, no harmful substances are leached; the nominal desalination rate is ≥99.7%, the organic matter rejection rate is ≥98.5%, the flux recovery rate after cleaning is ≥96%, and each unit is subjected to 30 minutes of stable testing before leaving the factory; the membrane can withstand a maximum pressure of 4.14MPa (600psi), no deformation or water leakage, and the maximum pressure drop is ≤0.8bar (11.6psi); the desalination performance and adaptability to brackish water reach the advanced level of the industry, and it can operate stably in brackish water environments for a long time; each batch of products has a unique production batch number and test report, which is fully traceable.

7. Working Principle

CPA2-4040 realizes efficient brackish water desalination, high desalination rate and stable operation based on the reverse osmosis principle, combined with composite polyamide membrane material technology and spiral wound structure design. Osmosis is a natural phenomenon in which water molecules spontaneously flow from a low concentration solution to a high concentration solution. Reverse osmosis applies a pressure greater than the osmotic pressure on the high concentration side (raw water side, i.e., brackish water side), forcing water molecules to pass through the semi-permeable membrane to the low concentration side (produced water side), while retaining salts, heavy metals, organic matter, SiO2, TOC and other harmful substances. The composite polyamide membrane adopted by this model has a dense structure and a pore size of only 0.1-0.2 nanometers, which only allows water molecules to pass through, ensuring high desalination rate. The spiral wound structure rolls the membrane sheet, flow channel net and collection pipe into a spiral shape, making the water flow evenly distributed on the membrane surface, generating a gentle scouring force, which can timely wash away the pollutants attached to the membrane surface, delay membrane fouling, and ensure stable operation in brackish water environments, which is consistent with the core principle of RO membrane water purification.

8. Future Prospects

With the increasing global water scarcity and the continuous expansion of brackish water utilization demand, CPA2-4040, with its core advantages of classic high desalination rate, strong adaptability to brackish water and high versatility, has broad development prospects. In the future, this model will be intelligently upgraded, integrating Internet of Things and sensor technology to realize real-time monitoring of water quality, membrane performance and desalination rate, and automatic reminder of cleaning and maintenance, which is in line with the development trend of intelligent water treatment. It will also continuously optimize the membrane material and structural design, further improve the desalination rate and anti-pollution performance, expand the applicable salt content range of brackish water, and reduce energy consumption. At the same time, it will expand application scenarios to new energy, agricultural irrigation and other emerging fields, promote the recycling of brackish water resources, improve the recycling rate of waste membranes, and reduce environmental pollution. In addition, it will provide one-stop services, covering product supply, installation and commissioning, maintenance and technical guidance, to further improve user experience and meet the diverse needs of brackish water treatment projects.

9. Conclusion

As the core standard model of the CPA series classic high-desalination brackish water RO membrane with strong versatility, CPA2-4040 takes composite polyamide membrane as the core and spiral wound structure as the support, integrating high-precision desalination technology and universal adaptation optimization. It effectively solves the pain points of traditional brackish water RO membranes such as insufficient desalination rate, poor adaptability and limited versatility in brackish water treatment scenarios. Its quality meets international and domestic standards, adapts to various brackish water treatment and multi-scenario water purification projects, can efficiently remove salts, SiO2, TOC and other harmful substances in brackish water, ensure stable and qualified water production, and provide reliable support for alleviating water scarcity and promoting water resource recycling. With the continuous optimization of technology, CPA2-4040 will continue to play a classic role in the field of brackish water treatment, helping to promote the green, efficient and sustainable development of the water treatment industry.

10. Frequently Asked Questions (FAQs)

Q1: What is the core function of CPA2-4040? A1: The core function is to realize efficient brackish water desalination and water purification through the reverse osmosis principle, with the characteristics of classic high desalination rate, strong adaptability to brackish water and high versatility, which can effectively retain salts, heavy metals, organic matter, SiO2, TOC and other harmful substances in brackish water, and provide stable and qualified water sources for multiple scenarios.

Q2: What is the service life of CPA2-4040, and how to extend it? A2: The service life is 3-5 years under normal maintenance. Regularly clean the membrane element according to the fouling situation, keep the operating parameters stable, avoid long-term contact with strong oxidants, replace the damaged sealing ring in time, and properly store it in the protective solution when not in use for a long time, which can extend the service life.

Q3: What is the applicable salt content range of CPA2-4040? A3: It is mainly applicable to brackish water with a salt content of 1000-10000mg/L, which can adapt to slight fluctuations in salt content, and is suitable for most brackish water sources such as coastal brackish water and inland saline groundwater.

Q4: What should I do if the desalination rate decreases during operation? A4: First, check whether the inlet water salt content and pH value are abnormal; second, check whether the membrane is fouled, and clean the membrane element in time with a special cleaning solution; finally, check whether the operating pressure is within the recommended range, and adjust it in time to ensure stable desalination performance.

Q5: Is special pretreatment required for CPA2-4040? A5: It is recommended to carry out simple pretreatment, filter to remove suspended solids and colloids in brackish water, remove residual chlorine (control ≤0.1ppm), reduce membrane pollution and extend service life. The pretreatment can be matched with conventional equipment without additional investment, which is especially important for brackish water with high impurity content.

RO Membrane Related Keywords

I. Core Keywords: CPA Series RO Membrane, CPA2-4040, , High-Desalination RO MembraneBrackish Water RO Membrane, Versatile RO Membrane, RO Membrane, Reverse Osmosis Membrane