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LP-8040 RO Membrane

LP-8040 RO Membrane adopts the original aromatic polyamide composite membrane which is desalinated with bitter alkaline water.

Brief Introduction

The LP-8040 RO Membrane adopts the world-renowned aromatic polyamide composite membrane for desalination with bitter alkaline water. 

It has the characteristics of low pressure operation, high water production and good desalination performance.

In addition, it has a high performance of removing soluble salts, TOC, SiO2, and is especially suitable for the preparation of high-purity water in the electronics and power industries.

Specifications and Major Properties


Average Permeated Flow GPD (m3/d)

Stable Rejection Rate (%)

Minimum Rejection Rate (%)

IWL 21-8040 10000(37.8) 99.5 99.2
IML 22-8040 11000(41.5) 99.5 99.2
IWL 21-4040 2500(9.4) 99.5 99.2

Testing Conditions: 

Testing Pressure: 225 psi (1.55Mpa)

Temperature of Testing Solution: 25°C

Concentration of Testing Solution (NaCl): 2000ppm

pH Value of Testing Solution: 7.5

Recovery Rate of Single Membrane Element: 15%

Extreme Operation Conditions

Max. Working Pressure: 600psi(4. 14Mpa)

Max. Feedwater Flow: 75gpm(17 m3/h) (8040)

16gpm (3.6 m3/h) (4040)

Max. Feedwater T emperature: 45°C

Max. Feedwater SDI: 5

Residual chlorine Concentration of Feedwater: < 0.1ppm

pH Range of Feedwater during Continuous Operation: 3~10

pH Range of Feedwater during Chemical Cleaning: 2~12

Max. Pressure Drop of Single Membrane Element: 15psi(0.1Mpa)

Dimensions of Membrane Element

All dimensions are shown in: millimeter (inch)