LC LE PRO-4040

4"x40" | 2,500 GPD | Low Energy| Fiber Wrapped | DuPont FilmTec (LC LE PRO-4040 Replaces DOW LC LE-4040)

In Stock for Immediate Shipment.
LC LE PRO-4040
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Brand DOW Filmtec
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AMI Membranes are Made-In-USA with a large inventory in stock for immediate shipment & are competitively priced.

DOW FilmTec Membrane Elements

FILMTEC™  LC LE PRO-4040 Low Pressure (Low Energy) Commercial RO Membrane Element

Direct Replacement for DOW FilmTec LC LE-4040

FilmTec LC LE PRO-4040 Elements deliver high quality water at low pressure at harsh water conditions, using technology for low energy commercial applications. DuPont’s fully automated element production enables consistent products and minimizes the total cost of ownership of water treatment systems.

DuPont Filmtec (Formerly DOW FILMTEC) Brackish Water Reverse Osmosis Elements 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.

FILMTEC LC LE PRO-4040 is FDA – 21 CFR 177.2550; Food and Drug Administration Compliant.

Product Specifications


FilmTec Membranes are FDA Compliant        

FILMTEC LC LE PRO-4040 is the direct replacement for DOW FilmTec LC LE-4040, which has been discontinued by the manufacturer.



Specifications for LC PRO LE-4040

FilmTec Product: LC LE PRO-4040
FilmTec Part Number: 12081512
Replaces Models:
LC LE-4040, 356603, 356602, LE-4040, 275173
Size (Approximate): 4" Dia. x 40"L
Flow Rate: 2,600 gpd (985 m³/d)
Applied Pressure: 125 psig (8.6 bar)
Stabilized Salt Rejection: 99.5%
Minimum Salt Rejection: 99.0%
Single Element Recovery: 15%
Exterior: Hard Shell Fiberglass
Active Area: 94 sq. ft.
Membrane Type:
Polyamide Thin-Film

Permeate flow and salt rejection based:  2,000 ppm NaCl feed stream, 77°F, 15% recovery, pH 8, 125 psig.

Operating Limits for LC LE 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.
***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.

Key Features and Benefits of DuPont LC LE PRO-4040 (DOW LC LE-4040) Low Pressure Membrane Element

  • LC LE PRO-4040 delivers high quality water at low pressure at harsh water conditions, using DuPont’s innovative, proprietary technology for low energy applications.
  • Industry leading active area (94 sqft) which provides less fouling due to lower operating flux while still achieving higher flow.
  • Offers high salt rejection at low pressure in harsh water conditions.
  • Provides most effective cleaning performance, robustness and durability due to its widest cleaning pH range (1 – 13) and chemical tolerance.

Key Applications for FilmTec LC LE PRO -4040 Commercial RO Membranes:

  • Light industrial applications requiring good permeate quality.
  • Harsh feed water condition.
  • Drinking water – Refilling stations, Bottling plants, Hotels, Schools, Institutions etc.

Physical Dimensions of DOW FilmTec LC LE PRO-4040

Dimensions for FilmTec Reverse Osmosis Membrane Element  
A 40.0 (1,016)
B 1.05 (26.7)
C 0.75 (19)
D 3.9 (99)

LC LE PRO-4040 fits nominal 4x40 size pressure vessels.