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4040 Ro Reverse Osmosis Membrane Price

4040 RO Reverse Osmosis Membrane for Sea Water Treatment.
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Product Advantages

RO membrane elements with end-locked connections, high effective membrane area and low energy consumption desalination reverse osmosis membrane elements with ultra-low energy consumption and single-stage design achieve the perfect combination of high productivity and high desalination rates and are ideally suited to isosaline and medium temperature feed water conditions. In addition, it is ideal for two-stage desalination designs or high salinity brackish water applications.

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)

Operating Precautions

To prevent potential membrane damage during start-up, shutdown, cleaning or other processes, avoid any sudden pressure or mis-flow flow changes in the rolled element. During start-up, we recommend a gradual transition from standstill to operation according to the following procedure.

1. The feed water pressure should be gradually increased over a time frame of 30 to 60 seconds.

2. The increase to the design mis-flow rate should be reached gradually over a period of 15-20 seconds.

3. The product water should be drained and not used within the first hour.