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LE-440i Equivalent

Product No.：TFBWLE-8040-440Li
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Equivalent, equivalence, replacement, alternative, analog, retrofit, analogue, derivative, substitution: DuPont DOW FilmTec DuPont DOW FilmTec LE-440i, LE440i

General Information

TFBWLE-8040-440Li is manufactured as an equivalent, replacement, alternative, retrofit, analogue to DuPont DOW FilmTec LE-440i (LE440i) RO membrane.

LE-440i equivalent reverse osmosis membrane elements TFBWLE-8040-440Li are developed for brackish water treatment, ideal for reverse osmosis plant managers and operators dealing with brackish water with pre-treatment.

This reverse osmosis membrane element provides consistency, high permeate water quality, high performance and productivity, and long service life.

Features & Advantages

Provides high-quality permeate water
Stable salt rejection rate and high permeate flow rate
Optimized design, good resistance to fouling results in long service life
High chemical tolerance for cleaning with highly effective cleaning performance
Economical equivalent element for direct replacement of DuPont DOW FilmTec LE-440i

Applications

Industrial pure water
Industrial wastewater reuse
Slightly contaminated water

Specifications

Configuration: Spiral wound element
Membrane Polymer: Polyamide thin-film composite

Performance

Element Model	Membrane Active Area ft² (m²)	Feed Spacer mil (mm)	Permeate Flow Rate* GPD (m³/d)	Stabilized Salt Rejection**	Minimum Salt Rejection
TFBWLE-8040-440Li	440 (41)	28 (0.712)	12,650 (48)	99.4%	99.2%

Standard test conditions:

The above performance is initial(data record after 30 minutes of operation), based on the following conditions:

2,000 ppm NaCl solution

150 psi (10.3 bar) operating pressure

25°C (77°F) operating temperature

15% permeate recovery

7.5-8 pH range

*Permeate flow for individual elements may vary but will be no more than ±15%.

**Stabilized salt rejection is generally achieved within 24-48 hours of continuous use; depending on feed water characteristics and operating conditions.

Element Dimensions

DuPont DOW FilmTec LE-440i Equivalent RO Membrane Element Equivalent Dimensions

Length L inch (mm)	Diameter D inch (mm)	Permeate tube inner diameter d inch (mm)
40 (1,016)	7.9 (201)	1.125 (28.6)

Operating and Cleaning Limits

Maximum Operating Pressure	600 psi (41 bar)
Maximum Operating Temperature	45°C (113°F)
Maximum Chlorine Concentration	0.1 ppm
pH Range, Continuous	2-11
pH Range, Cleaning	1-13
Maximum Feed SDI (15 mins)	5
Maximum Element Pressure Drop	15 psi (1 bar)
Maximum Feed Flow	17 m³/h
Minimum Ratio of Concentrate to Permeate Flow for Each Element	5:1

The limits shown above are for general applications. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane element.

We offer various RO membrane element equivalents. If you and your customer accept DuPont DOW FilmTec LE-440i equivalent RO membrane element, please send us an inquiry now.

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