4"x40" | 2,500 GPD | Low Energy| Fiber Wrapped | DOW FilmTec

In Stock for Immediate Shipment.
LC LE-4040
Price $271.77
More Information
Price $271.77
Brand DOW Filmtec
Compare with Similar Items
Note that DuPont has acquired DOW FilmTec with significant cost increases. We continue to offer DuPont elements but we also recommend AMI Membranes as the preferred alternative. AMI Membranes are Made-In-USA with a large inventory in stock for immediate shipment & are competitively priced.

DOW FilmTec Membrane Elements

DOW FILMTEC™  LC LE-4040 Large Commercial Low Energy RO Membrane Element

DOW FILMTEC LC LE-4040 Membrane Elements deliver high quality water at low pressure at harsh water conditions, using Dow’s innovative, proprietary technology for low energy commercial applications. Dow’s fully automated element production enables the most consistent products in the industry that minimizes the total cost of ownership of water treatment systems.

DOW 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.

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

Product Specifications


FilmTec Membranes are FDA Compliant     Genuine DOW FilmTec Membrane Element   



Specifications for LC LE-4040

FilmTec Product: LC LE-4040
FilmTec Part Number: 356603 (356602)
Replaces Models:
LE-4040, 275173
Size (Approximate): 4" Dia. x 40"L
Flow Rate: 2,500 gpd (9.5 m³/d)
Applied Pressure: 125 psig (8.6 bar)
Stabilized Salt Rejection: 99.2%
Minimum Salt Rejection: 99.0%
Feed Spacer Thickness: 28 mil
Single Element Recovery: 15%
Exterior: Hard Shell Fiberglass
Feed Spacer Thickness: 28 mil
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-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.

Related Products for use with LC LE-4040

PV4040SSAU-316 Stainless Steel Membrane Housing Pressure Vessel for 4" x 40" Membrane Element
PV4080SSAU-316 Stainless Steel Membrane Housing Pressure Vessel for two (2)  4" x 40" Membrane Elements
40E30N-1 CodeLine Fiberglass Membrane Housing Pressure vessel for 4" x 40" Membrane Element
PV4040PWG PVC Membrane Housing Pressure Vessel for 4" x 40" Membrane Element

Benefits of DOW FilmTec Commercial RO Membranes

  • High rejection results in excellent water quality
  • Low energy usage reduces power consumption and costs
  • Fiberglassed hard shell to withstand higher pressure drops
  • Durable with good cleanability for long element life
  • FilmTec performance and quality

Common Applications for FilmTec LC LE-4040 Commercial RO Membranes:

  • Industrial Water Demineralization
  • Production of Municipal Water
  • Water Reuse
  • Commercial Water Treatment Systems

Physical Dimensions of DOW FilmTec LC LE-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)

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

For more information, please visit this products webpage.