4"x40" | 2,400 GPD | Tape Wrapped | DuPont FilmTec RO Membrane (Replaces TW30-4040)

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TW30 PRO-4040
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Brand DOW Filmtec
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DOW FilmTec Membrane Elements

DUPONT FILMTEC™  TW30 PRO-4040 Commercial Reverse Osmosis Membrane Element

 Direct Replacement for FilmTec TW30-4040, which is now obsolete. 

DUPONT FILMTEC (Formerly DOW FilmTec) TW30 PRO-4040 Elements are the industry standard for reliable operation and production of the highest quality water in commercial applications. This element features the thickest feed spacer (34 mil) available in the industry today to lessen the impact of fouling. DOW FILMTEC TW30 PRO-4040 elements are tape-wrapped—built with the same high quality membranes and materials of construction as industrial elements, except for the hard outershell, and are more economical for commercial systems with one or two elements per housing.

FILMTEC Brackish Water Reverse Osmosis Elements can separate salts from water and are produced with an automated fabrication process for precision, consistency, and reliability. DOW FILMTEC 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.

DuPont FILMTEC TW30 PRO-4040 is the direct replacement for TW30-4040 which has been discontinued by the manufacturer.

Product Specifications





Specifications for TW30 PRO-4040

FilmTec Product: TW30 PRO-4040
FilmTec Part Number: 12080472
Replaces Products: TW30-4040, 80610
Size (Approximate): 4" Dia. x 40"L
Flow Rate: 2,600 gpd (9.8m³/d)
Applied Pressure: 225 psig (15.5 bar)
Stabilized Salt Rejection: 99.7%
Feed Spacer: 34 mil
Single Element Recovery: 15%
Exterior: Tape-Wrapped
Membrane Type:
Polyamide Thin-Film

Permeate flow and salt rejection based:  2,000 ppm NaCl feed stream, 77°F, 15% recovery, 225 psig.

Operating Limits for TW30 PRO-4040

Maximum Operating Temperature: 113°F (45°C)
Maximum Operating Pressure: 600 psig (41 bar)
Maximum Pressure Drop: 13 psig (0.9 bar)
Maximum Feed Flow Rate: 14 gpm (3.2m³/h)
pH Range, Continuous Operation*: 2-11
pH Range, Short-Term Cleaning**: 1-13
Maximum Feed Silt Density Index: 5
Fere Clorine Tolerance***: <0.1ppm
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*Maximum temperature for continuous operation above pH 10 is 95&deg;F
**Refer to cleaning guidelines.
***Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, Dow recommends removing residual free chlorine by pretreatment prior to membrane exposure.

Benefits of FilmTec Commercial RO Membranes

  • Reverse Osmosis water treatment removes up to 99% of total dissolved solids from water.
  • Thick feed spacer minimizes the impact of fouling
  • High flux results in high yields
  • High rejection provides good water quality
  • FilmTec performance and quality

Common Applications for FilmTec TW30 PRO-4040 Commercial RO Membranes:

  • Commercial Water Treatment Systems
  • Food Service
  • Medical and Research Institutions
  • Hospitality Industry

Physical Dimensions of DOW FilmTec TW30 PRO-4040

DOW FilmTec Commercial RO Membrane Drawing &nbsp;
&nbsp; INCHES (MM)
A 40.0 (1,016)
B 1.05 (27)
C 0.75 (19)
D 3.9 (99)
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TW30 PRO-4040 fits nominal 4x40 size pressure vessels.