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Reverse Osmosis Membrane/8" Water Treatment Membrane


Brief Introduction

Reverse osmosis membrane separation technology uses the principle of reverse osmosis membranes to separate solutes and water at room temperature without phase change, and is suitable for the separation and concentration of heat sensitive substances, with lower energy consumption compared to separation methods with phase change.

Reverse Osmosis Membrane/8" Water Treatment Membrane, which have a high desalination and water reuse rate, can retain solutes with particle sizes of several nanometres or more.

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 1 1000(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)

Dimensions of Membrane Element (1)

Dimensions of Membrane Element (2)


This Reverse osmosis membranes are composite polyamide reverse osmosis membranes that achieve both high desalination rates and high water permeability during low pressure operation. 

They are suitable for industrial water treatment such as ultra-pure water for the electronics industry and boiler make-up water for power plants.