4"x40" | 2,750 GPD | Low Energy | Tape Wrap | FilmTec Membrane | Replaces XLE-4040

In Stock for Immediate Shipment.
XLE PRO-4040
More Information
Brand DOW Filmtec
Compare with Similar Items

AMI Membranes are Made-In-USA with a large inventory in stock for immediate shipment & are competitively priced alternatives to DuPont Membranes.

DOW FilmTec Membrane Elements

FILMTEC™  XLE PRO-4040 Brackish Water Reverse Osmosis Membrane Element

DUPONT FILMTEC™ XLE PRO-4040 Elements offer better system performance and economics for small commercial systems by operating at very low applied pressure. FILMTEC XLE PRO-4040 elements are tape-wrapped. In addition to high quality water and low energy costs, FILMTEC membranes also deliver savings by providing long lasting and reliable performance. For added convenience, the elements are available in a dry state for rapid start-up.

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

Product Specifications


DOW and Dupont merged and DOW FilmTec membranes are now sold as DUPONT FilmTec. FilmTec XLE-4040 membrane element has been discontinued by the manufacturer. XLE PRO-4040 is the direct replacement.


Specifications for XLE PRO-4040

FilmTec Product: XLE PRO-4040
FilmTec Part Number: 12082995
Replaces FilmTec Parts: XLE-4040
Size (Approximate): 4" Dia. x 40"L
Flow Rate: 2,750 gpd (10.4 m³/d)
Applied Pressure: 125 psig (8.7 bar)
Stabilized Salt Rejection: 99.0%
Minimum Salt Rejection: 970%
Single Element Recovery: 15%
Exterior: Tape-Wrapped
Membrane Type:
Polyamide Thin-Film

Permeate flow and salt rejection based on the following test conditions: 77°F (25°C), 15% recovery, applied pressure 125 psig (8.7 bar), pH 8, and based on a 2,000 ppm NaCl feed stream

Operating Limits for XLE 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

*Maximum temperature for continuous operation above pH 10 is 95°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 DOW FilmTec Commercial RO Membranes

  • Lower Operating Pressure reduces power consumption, lowering the cost of equipment and operation.
  • Reverse Osmosis water treatment removes up to 99% of total dissolved solids from water.
  • High flux results in high yields
  • High rejection provides good water quality
  • FilmTec performance and quality

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

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

Physical Dimensions of DOW FilmTec XLE PRO-4040

DOW FilmTec Commercial RO Membrane Drawing  
A 40.0 (1,016)
B 1.05 (27)
C 0.75 (19)
D 3.9 (99)

XLE PRO-4040 fits nominal 4x40 size pressure vessels.