Filmtec BW30 PRO-400/34i

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DuPont FilmTec™ BW30 PRO-400/34i High Rejection Brackish Water RO Membrane – 8" x 40" with iLEC™ Interlocking End Caps | 11,000 GPD

The FilmTec™ BW30 PRO-400/34i is DuPont’s premium high-performance brackish water reverse osmosis membrane, engineered for large-scale municipal and industrial systems that demand consistent high-purity permeate with maximum efficiency and reliability.

Building on the legendary BW30 platform with decades of proven field performance, this next-generation element delivers higher flow, superior salt rejection, and enhanced fouling resistance. The innovative iLEC™ interlocking end caps minimize O-ring leaks, reduce telescoping risk, lower operating costs, and simplify installation — making it the smart choice for new builds and retrofits.

With a thick 34 mil feed spacer, it provides excellent protection against fouling and scaling, even with challenging brackish feed waters. Ideal for systems producing over 10 GPM of permeate, the BW30 PRO-400/34i helps you achieve lower energy consumption, reduced cleaning frequency, and longer membrane life.

Key Benefits:

• High Productivity & Rejection — Nominal permeate flow of 11,000 GPD (42 m³/d) with 99.6% stabilized salt rejection (minimum 99.4%) at standard test conditions (2,000 ppm NaCl, 225 psi).
• iLEC™ Interlocking End Caps — Reduces O-ring related leaks and telescoping, improving water quality and lowering maintenance costs.
• Enhanced Fouling Resistance — 34 mil feed spacer thickness improves cleaning effectiveness and extends element life in fouling-prone waters.
• Fiberglass Outer Wrap — Provides superior structural strength for high-pressure industrial operation.
• Robust & Durable — Polyamide thin-film composite construction with wide pH tolerance (2–11 continuous, 1–13 for cleaning) and excellent durability.
• Proven Industry Standard — Replaces and improves upon previous BW30-400 and BW30-400/34i generations.

Ideal Applications:

• Municipal drinking water purification
• Industrial demineralization (power generation, steel & metal processing, chemical & petrochemical)
• Food & beverage production
• Brackish water desalination and water reuse projects
• Large commercial and institutional RO systems

Technical Specifications:

• Active Area: 400 ft² (37 m²)
• Feed Spacer: 34 mil
• Permeate Flow Rate: 11,000 GPD (42 m³/d) nominal
• Stabilized Salt Rejection: 99.6%
• Membrane Type: Polyamide Thin-Film Composite
• Dimensions: 40" Length × 8" Diameter (net length when interlocked: 40")
• Maximum Operating Pressure: 600 psi (41 bar)
• Maximum Operating Temperature: 113°F (45°C)
• Maximum Pressure Drop: 15 psi per element / 50 psi per vessel
• pH Range (Continuous): 2–11
• Free Chlorine Tolerance: <0.1 ppm
• Maximum Feed SDI: 5
• Maximum Feed Flow: 75 GPM (17 m³/h)

Backed by DuPont’s world-class quality and innovation, the BW30 PRO-400/34i delivers stable, long-term performance that minimizes total cost of ownership while maximizing permeate quality.

Pro Tip: For best results, always use proper pretreatment, follow DuPont design guidelines, and pair with compatible FilmTec™ elements in your pressure vessels.

Upgrade your RO system with the FilmTec™ BW30 PRO-400/34i today — experience higher rejection, better fouling resistance, and lower operating costs.