BW30 PRO-4040

4"x40" | 2,400 GPD | Fiber Wrapped | DOW FilmTec RO Membrane | Replaces BW30-4040 & LC HR-4040

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BW30 PRO-4040
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Brand DOW Filmtec
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DOW FilmTec Membrane Elements

DuPont FILMTEC™  BW30 PRO-4040 Brackish Water Reverse Osmosis Membrane Element (Direct Replacement for DOW FilmTec BW30-4040 & LC HR-4040 )

Fiberglassed Large Commercial Elements for Challenging Water Conditions

DuPont FILMTEC BW30 PRO-4040 (formerly DOW FIlmtec BW30-4040) membrane elements are an industry standard for reliable operation and production of high quality water in light industrial and drinking water applications. This element features the fouling resistance membrane chemistry (made in USA) and thicker feed spacer to lessen the impact of fouling in harsh water conditions as well as a fiberglassed shell, which is recommended for systems with multiple-element housings containing three or more membranes, as they are designed to withstand higher pressure drops. For the most effective cleaning, the element may be cleaned over a wide pH range (pH 1 – 13).

FilmTec™ Brackish Water Reverse Osmosis 4" Elements can separate salts from water and are produced with an automated fabrication process that ensures precision, consistency, and reliability. They are ideal for use in medium-sized water treatment system that produce less than approximately 10 gpm (2300 L/h) of permeate. Our RO membranes build on a tradition of leadership in the thin-film composite membrane industry and meet the challenges of higher rejection in lower-pressure operations.

Product Specifications


Specifications for FilmTec BW30 PRO-4040

FilmTec Product: BW30 PRO-4040
Replaces Product: BW30-4040
LC HR-4040
FilmTec Part Number: 12080524
Size (Approximate): 4" Dia. x 40"L
Flow Rate: 2,600 gpd (9.8 m³/d)
Applied Pressure: 225 psig (15.5 bar)
Stabilized Salt Rejection: 99.7%
Minimum Salt Rejection: 99.5%
Single Element Recovery: 15%
Exterior: Hard Shell Fiberglass
Feed Spacer: 34 mil
Membrane Type:
Polyamide Thin-Film

Permeate flow and salt rejection based on the following test conditions: 2,000 ppm NaCl and 225 psig (15.5 bar), pH 8, 77°F (25°C) and 15% recovery.

Operating Limits for BW30 PRO-4040

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 600 psig (41 bar)
Maximum Pressure Drop: 15 psig (1 bar)
Maximum Feed Flow Rate: 16 gpm (3.6m³/h)
pH Range, Continuous Operation*: 2-11
pH Range, Short-Term Cleaning**: 1-13
Maximum Feed Silt Density Index: SDI 5
Fere Clorine Tolerance: <0.1ppm

*Maximum temperature for continuous operation above pH 10 is 95°F
**Refer to cleaning guidelines.

DOW FilmTec vs DuPont FilmTec & Membrane Compatibility Notes:

  • DowDuPont merger was completed in 2017 and FilmTec Corporation was moved to DuPont. DOW Water Solutions and DOW FilmTec Membranes are now DuPont Water Solutions and DuPont FilmTec Membranes.

  • FilmTecMembranes BW30-4040 and LC HR-4040 were discontinued by DuPont in 2022 and are replaced by FilmTec BW30 PRO-4040 which is the direct replacement with superior performance specifications.

Key Features and Benefits of DuPont FilmTec BW30 Commercial RO Membranes

  • Delivers consistent water quality and higher rejection and flow than previous generation FilmTec™ BW30 product for good water quality
  • Based on historical FilmTec™ BW30 industry-standard RO membrane with decades of proven performance
  • Outstanding durability resulting in stable, long-term performance and sustainable water solutions
  • Enhanced fouling protection
  • Dry elements achieve quick stabilization
  • High flux results in high yields
  • Durable with good cleanability for long element life
  • Thick feed spacer minimizes the impact of fouling
  • Fiberglassed hard shell to withstand higher pressure drops
  • FilmTec performance and quality

Common Applications for FilmTec BW30 PRO-4040 Commercial RO Membranes:

  • Commercial water treatment systems
  • Food service
  • Medical and research institutions
  • Hospitality industry
  • Industrial Water Demineralization
  • Production of Municipal Water
  • Water Reuse
  • Commercial Water Treatment Systems

Physical Dimensions of DuPont FilmTec BW30 PRO-4040

Dimensions for FilmTec Reverse Osmosis Membrane Element  
A 40.0 (1,016)
B 1.05 (27)
C 0.75 (19)
D 3.9 (99)

BW30 PRO-4040 has identical dimensions as BW30-4040 & LC HR-4040 and fits nominal 4x40 size pressure vessels.