Description
RO-4040-FF 4″ and RO-390-FF 8″ FilmTec DOW DuPont membranes
FilmTec Sanitary RO membranes, including the RO-4040-FF and RO-390-FF, are high-performance reverse osmosis elements designed specifically for water treatment applications in the food and beverage industry. These membranes offer a state-of-the-art sanitary desalination solution, enabling water treatment plant operators to reduce capital and operating costs.
FilmTec Sanitary RO membranes feature the high rejection FT30 technology, which has been successfully used to process a wide range of food and beverage products, such as bottled water, juices, soft drinks and non-dairy dairy products. Thanks to their “full-fit” design, these membranes minimize stagnant areas and are ideal for applications requiring a sanitary design. All components meet FDA requirements for indirect food contact.
Some typical features of FilmTec RO-4040-FF and RO-390-FF membranes include a high active area and a stabilized permeate flux, resulting in excellent water quality and high salt removal efficiency. These membranes also have a wide pH operating range, making them compatible with a variety of applications and operating conditions.
Discover how FilmTec™ Sanitary RO-4040-FF and RO-390-FF membranes can improve water quality in your food and beverage processes while ensuring safety and compliance in your industry.
FilmTec™ membranes |
Part number |
Active area ft² (m²) |
Stabilized permeate flow gpd (m³/d) |
Typical rejection of stabilized salts (%) |
|---|---|---|---|---|
RO-4040-FF 4×40″ RO-4040-FF 4×40 |
8428690 |
90 (8.36) |
2,650 (10.0) |
99.5 |
RO-390-FF 8×40″ RO-390-FF 8×40 |
116314/100608 |
390 (36.23) |
13,700 (51.8) |
99.5 |
- Permeate flow and salt rejection based on the following standard conditions: 2,000 ppm NaCl, 225 psi (15.5 bar), 77°F (25°C), pH 8 and 15% recovery.
- Minimum salt rejection is 98.0%.
- RO-390-FF flow rates for individual elements may vary, but will not be more than ±15%.
- RO-4040-FF flow rates for individual elements may vary, but will not be more than ±21%.
- Stabilized salt rejection is generally achieved within 24-48 hours of continuous use; depending on feed water characteristics and operating conditions.
FilmTec RO-4040-FF membrane
They offer high flow and exceptional water quality for applications requiring sanitary grade membrane elements. These reverse osmosis membranes are ideal for applications in the food, pharmaceutical and water treatment industries.
The “full-fit” configuration of FilmTec™ RO-4040-FF membranes minimizes stagnant areas, making them optimal for applications requiring a sanitary design. All materials used in their manufacture meet the indirect food contact requirements of the U.S. Food and Drug Administration (FDA), making them suitable for use in food processing in the United States.
Some of the key benefits of FilmTec™ RO-4040-FF membranes include their high contaminant removal efficiency, their ability to withstand rigorous cleaning and disinfection processes, and their compatibility with a wide variety of industrial and commercial applications.
Discover how FilmTec™ RO-4040-FF membranes can improve water quality in your processes and ensure safety and compliance in your industry.
FilmTec RO-390-FF 8″ RO-390-FF Membrane
It is the leading solution in the market for the polishing of evaporator condensate. With a higher active area than competing elements, FilmTec™ RO-390-FF membranes maximize performance and reduce capital costs by requiring the fewest elements for polishing applications. All materials used in their construction meet the indirect food contact requirements of the U.S. Food and Drug Administration (FDA), making them suitable for use in food processing applications in the United States. FilmTec RO-390-FF DOW membranes provide high flux and exceptional water quality for applications requiring sanitary grade membrane elements.
FilmTec Specialty 8-inch FilmTec elements have been developed through industry-leading research to meet specific application requirements such as ultra-pure water for microelectronics manufacturing, sulfate removal from injection water on offshore oil rigs, and products that can undergo thermal sanitization processes for use in medical applications.
Discover how FilmTec RO-390-FF membranes can improve water quality in your processes and ensure safety and compliance in your industry.
Operating and cleaning limits of FilmTec membranes
FilmTec membranes are of the thin film composite type and have specific operating and cleanliness limits to ensure optimum performance and long service life. These limits include:
- Maximum operating temperature: 113ºF (45ºC)
- Maximum operating pressure: 600 psi (41 bar)
- Maximum pressure differential: 15 psi (1.0 bar)
- Maximum turbidity of feed water: 1 NTU
- Tolerance to free chlorine: below detectable limits
- pH range for continuous operation: 3-10
- pH range for short term cleaning (30 min): 1-12
- Maximum sediment density index (SDI): 5
For detailed information on cleaning guidelines, please refer to the FilmTec™ Cleaning Guides (Form No. 45-D01696-en).
Important additional information
Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for service operation and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper startup sequence also helps ensure that system operating parameters are within design specifications so that system water quality and productivity objectives can be achieved.
Membrane pretreatment, membrane element loading, instrument calibration and other system checks must be completed prior to initiating system start-up procedures. Refer to the application information literature entitled “Startup Sequence” (Form No. 45-D01609-en) for more information.
Membrane operation
Avoid sudden pressure variations or cross-flow in the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible damage to the membranes. During startup, a gradual change from an idle state to the operating state is recommended as follows:
- The feed pressure should be increased gradually over a period of 30 to 60 seconds.
- Crossflow velocity at the set operating point should be gradually achieved in 15-20 seconds.
General information
- Keep the elements moist at all times after initial wetting.
- Failure to strictly follow the operating limits and guidelines provided in this bulletin will render the limited warranty null and void.
- To prevent biological growth during prolonged system shutdowns, it is recommended that the membrane elements be immersed in a preservative solution.
- The customer is fully responsible for the effects of incompatible chemicals and lubricants on the elements.
- The maximum pressure drop in a full pressure vessel (casing) is 60 psi (4.1 bar).
- Avoid back pressure on the permeate side at all times.
Product liability
DuPont has a fundamental concern for everyone who manufactures, distributes and uses its products, as well as for the environment in which we live. This concern is the basis of our product responsibility philosophy, whereby we evaluate the safety, health and environmental information of our products and take appropriate measures to protect the health of employees and the public, as well as our environment. The success of our product responsibility program depends on every person involved with DuPont products, from initial concept and research through manufacturing, use, sale, disposal and recycling of each product.
