Compliance & Document Hub
- USA FDA Food Additive Status compliant under 21 CFR § 177.2550 for processing liquid food and purifying water for food manufacturing.
- Element parts or materials in contact with potable water are compliant to 21 CFR § 170 to 199.
Executive Product Summary
The DuPont FilmTec BW30XHR PRO-400/34i is an extra high-rejection brackish water reverse osmosis (RO) membrane element engineered for large-scale industrial and municipal water treatment systems. Manufactured utilizing advanced polyamide thin-film composite technology, this element features a highly optimized 400 ft² (37 m²) active surface area. By leveraging an automated fabrication process, DuPont ensures precision consistency capable of yielding an exceptional 11,500 gpd (43.5 m³/d) permeate flow rate under standard conditions. The element guarantees a stabilized salt rejection of 99.8% alongside unparalleled rejection rates for critical contaminants including silica, boron, nitrate, TOC (Total Organic Carbon), and ammonium.
One of the defining engineering advantages of the BW30XHR PRO-400/34i is the integration of iLEC (Interlocking End Caps) technology. This proprietary design dramatically reduces total cost of ownership (TCO) and system OPEX by mechanically interlocking adjacent elements, entirely eliminating the need for inter-element O-rings. By removing traditional O-ring seals, the iLEC system nullifies the risk of O-ring leaks that frequently cause the bypass of poor-quality feedwater into the clean permeate stream. To further extend operational lifespans and maintenance intervals, the element is equipped with a 34-LDP (Low Differential Pressure) feed spacer, which offers superior enhanced fouling protection compared to standard industry spacers when processing difficult feedwaters.
The operating envelope of this membrane provides robust performance reliability for mechanical and chemical engineers. It accommodates a maximum operating pressure of 600 psi (41 bar) and a maximum feed flow of 75 gpm (17 m³/h). The thermal limitation is rated to 113°F (45°C) under standard conditions, with a restriction to 95°F (35°C) when operating continuously above pH 10. The chemical compatibility profile is exceptionally wide, permitting continuous operation between pH 2 and 11, and facilitating aggressive short-term chemical cleanings (up to 30 minutes) at a pH range of 1 to 13. System designers must strictly enforce pre-treatment dechlorination, as the polyamide membrane dictates a free chlorine tolerance of strictly < 0.1 ppm to prevent irreversible oxidative degradation. For optimum start-up, elements must be kept moist at all times after initial wetting, and permeate obtained from the first hour of operation should be discarded. Static permeate-side backpressure must be avoided at all times to preserve the structural integrity of the composite layer.
Applications & Industry Use-Cases
- Power Generation Boiler Feedwater: The 99.8% stabilized salt rejection and robust silica reduction make this RO element highly critical for boiler feedwater demineralization, preventing aggressive turbine scaling and significantly reducing blowdown frequency.
- Chemical & Petrochemical Processing: Deployed in harsh industrial processing environments where the membrane's ability to withstand aggressive pH 1-13 cleaning cycles guarantees longevity and reliable process solvent dilution.
- Municipal Water Purification: Ideally suited for heavy municipal water infrastructure targeting brackish surface water or groundwater, utilizing the massive 11,500 gpd permeate yield to reliably meet large population demands.
- Food & Beverage Manufacturing: Fully compliant with USA FDA 21 CFR § 177.2550 and § 170 to 199, ensuring this membrane can be legally and safely utilized in liquid food processing without the risk of transferring toxic leachates.
- Steel & Metal Manufacturing: Provides high-volume demineralization for critical cooling processes and metallurgy rinse water, where the enhanced 34-mil LDP spacer prevents particulate fouling from the typically high SDI sources found in heavy industry.
- High-Purity Industrial Permeate Production: Engineered specifically for applications requiring extremely stringent permeate quality. The iLEC interlocking end caps ensure zero raw water bypass, safeguarding ultra-pure water loops in advanced manufacturing processes.
Cross-Compatibility & System Integration
The DuPont FilmTec BW30XHR PRO-400/34i is meticulously designed to act as a direct, drop-in replacement for standard 8-inch industrial pressure vessels. Measuring 7.9 inches (201 mm) in outer diameter with an inner diameter interface of 1.125 inches (29 mm), the element integrates seamlessly into standard global RO plant architectures. A core integration feature is the iLEC interlocking end cap system. Individual elements measure 40.5 inches (1,029 mm) in length inclusive of the interlocking mechanisms, but perfectly compress to a standardized net length of 40.0 inches (1,016 mm) when coupled together in series inside the pressure vessel.
System engineers should note that the physical connection utilizes a U-Cup Brine Seal and a Fiberglass Outer Wrap for structural rigidity against transverse pressure differentials. The maximum pressure drop per individual element is specified at 15 psi (1.0 bar). However, for multi-element array integrations, the maximum pressure drop across an entire pressure vessel containing a minimum of four coupled elements is rated at 50 psi (3.5 bar). Customers are advised to ensure that all lubricants and preservative chemicals utilized during the loading of pressure vessels are explicitly compatible with polyamide thin-film composite materials.
Frequently Asked Questions
Q: What is the permeate flow rate of the DuPont FilmTec BW30XHR PRO-400/34i?
The membrane delivers a nominal permeate flow rate of 11,500 gpd (43.5 m³/d) based on standard test conditions of 2,000 ppm NaCl, 225 psi, and 77°F. Flow rates for individual elements may vary by up to 15%.
Q: Is the BW30XHR PRO-400/34i FDA compliant for food processing?
Yes, when used unmodified and according to good manufacturing practices, this element complies with the U.S. Food, Drug and Cosmetic Act under Food Additive Regulation 21 CFR § 177.2550. Element parts in contact with potable water comply with 21 CFR § 170 to 199.
Q: What is the maximum operating pressure for this RO element?
The maximum operating pressure is 600 psi (41 bar). It is critical to monitor differential pressure to ensure it does not exceed 15 psi per element or 50 psi across a standard pressure vessel containing at least four elements.
Q: Does this element include interlocking end caps?
Yes, the "i" designation in the model number denotes that it is equipped with DuPont's proprietary iLEC™ interlocking end caps. This eliminates the need for inter-element O-rings, severely reducing the risk of leak-induced contamination.
Q: What is the free chlorine tolerance of the membrane?
The polyamide thin-film composite membrane requires a free chlorine tolerance of strictly < 0.1 ppm. DuPont explicitly recommends removing all residual free chlorine through pre-treatment prior to membrane exposure to prevent irreversible oxidation damage.
Q: Where can I buy the DuPont FilmTec BW30XHR PRO-400/34i in bulk?
You can source this industrial element globally through Growthbet LTD. Contact our procurement team at sales@growthbet.net for exact DDP landed-cost quotations and bulk delivery timelines.
Source This Product From Growthbet LTD
Growthbet LTD is a UK-registered global industrial procurement company specializing in sourcing and delivering technical components under a full-liability DDP (Delivered Duty Paid) model. When you source through Growthbet, the company assumes complete responsibility for supplier verification, quality control, international freight, customs clearance, and last-mile delivery to your facility — with a single, transparent invoice and no hidden costs.
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