Industrial RO Membrane: Complete Guide, Types, Prices, Brands (2025)

Industrial RO membranes play a crucial role in large-scale water purification systems used in factories, commercial facilities, processing industries, and water treatment plants. With increasing demand for quality water output and efficient filtration, choosing the right Industrial RO Membrane has become critical for system performance.

This blog gives you a complete guide to how Industrial RO membranes work, comparison between 4040 and 8040 RO membranes, membrane pricing, and detailed insights into top brands such as Ontoz membrane, Toray membrane, Dupont membrane, and Dow membrane. You will also find direct product links and verified sellers so you can make a confident purchase decision.

What Is an Industrial RO Membrane?

An Industrial RO Membrane is a spiral-wound filtration membrane designed to remove dissolved salts, heavy metals, contaminants, and impurities from feed water. These membranes are used in large RO plants and industrial water treatment systems handling TDS levels between 500 and 5000+ ppm.

Industrial RO membranes are engineered for:

• High salt rejection

• High permeate flow

• Low operating energy cost

• Long lifespan

• Chemical resistance

These membranes play a vital role in industries such as pharmaceuticals, FMCG, textiles, beverages, food processing, chemical manufacturing, boiler feed applications, and more.

How Does an Industrial RO Membrane Work?

Industrial RO membranes operate based on reverse osmosis, a process where pressurized water flows through a semi-permeable membrane. The membrane allows only pure water molecules to pass, while dissolved salts and contaminants are rejected.

The process involves:

1. High-pressure pump pushing the water

2. Feed water entering membrane sheets

3. Pure water (permeate) passing through

4. Rejected impurities (concentrate) being flushed out

This efficient mechanism makes an RO membrane suitable for industries requiring large-volume purified water.

Types of Industrial RO Membranes

Industrial membranes primarily come in two sizes:

1. 4040 RO Membrane

A 4040 RO membrane has a diameter of 4 inches and a length of 40 inches. It is ideal for small to medium industrial RO plants.

Key features:

• Lower water output than 8040

• Budget-friendly RO membrane price

• Easy to install

• Suitable for lower flow applications

Popular 4040 options include:

• Ontoz 4040 RO Membrane

• Dupont BW 30 4040 Membrane

• Dow membrane 4040
  Available under DOW brand page

2. 8040 RO Membrane

An 8040 membrane is 8 inches in diameter and 40 inches in length. It is used in medium to large industrial RO plants.

Key features:

• Much higher permeate flow

• Best suited for heavy industrial usage

• Higher pressure handling

• Long lifespan

Popular 8040 options include:

• Ontoz 8040 RO Membrane

• Dupont BW 30 8040 Membrane

• Toray membrane 8040
  Available via industrial sellers like Ocean Star Technologies:

• Dow membrane 8040
  Check DOW brand page:

4040 RO Membrane vs 8040 RO Membrane

For small and medium industries, the 4040 RO membrane is cost-effective.
For large water purification needs, the 8040 RO membrane provides higher efficiency and lower cost per liter.

Top Industrial RO Membrane Brands

Here is an overview of the leading globally trusted RO membrane brands.

1. Ontoz Membrane

Ontoz membranes are known for price affordability, long life, and high performance in variable TDS levels.

Brand page:
Ontoz

Recommended products:

• Ontoz 8040

• Ontoz 4040

2. Toray Membrane

Toray is a Japanese technology brand known for stable output, high salt rejection, and durability.

Find Toray membranes via seller store:

3. Dupont Membrane

Dupont (formerly DOW) is a world leader in membrane technology, ideal for high-performance industrial applications.

Recommended products:

• Dupont 8040 Membrane

• Dupont 4040 Membrane

4. Dow Membrane

DOW membranes deliver excellent salt rejection and stable performance across industrial settings.

Industrial RO Membrane Price Guide

Understanding the pricing of industrial RO membranes is essential before purchasing.

Factors that affect RO membrane price:

1. Feed water TDS level

2. Operating pressure

3. Size (4040 or 8040 membrane)

4. Brand quality

5. Technology used

6. Expected life

7. Seller reliability

Toray membrane 8040 price

Prices vary based on model and seller. Check Toray availability:

Dow membrane price

Complete DOW range available here:

Dow membrane 8040 price

Available under DOW brand category above.

Dupont membrane price

Product-specific links:

• Dupont BW 30 8040

• Dupont BW 30 4040

Ontoz membrane price

Find all Ontoz membranes here:

Recommended Industrial RO Membranes

Below are the most reliable and best-value membranes across different categories.

1. Ontoz 8040 Industrial RO Membrane

2. Ontoz 4040 Industrial RO Membrane

3. Dupont BW 30 8040 Industrial RO Membrane

4. Dupont BW 30 4040 Industrial RO Membrane

5. Dow Membranes (4040 & 8040)

Verified Seller Stores

• Ocean Star Technologies

• Velient PEC India

How to Choose the Right Industrial RO Membrane

To select the best membrane for your plant, consider the following:

1. TDS level of feed water

2. Daily water output requirement

3. Membrane size compatibility (4040 or 8040)

4. Brand trustworthiness

5. Operating pressure and pump capacity

6. Chemical compatibility

7. Expected lifespan

8. Maintenance budget

If handling high TDS (above 3000 ppm), go for high-rejection membranes like Dupont or DOW.
For cost-effective operations, Ontoz membrane offers excellent value.

Maintenance Tips to Increase Membrane Lifespan

1. Pre-treatment filtration (sand filter, carbon filter)

2. Regular chemical cleaning every 3–6 months

3. Maintain correct operating pressure

4. Avoid chlorine exposure

5. Monitor permeate flow and salt rejection

6. Flush membranes after shutdown

Proper maintenance ensures stable performance and prevents premature membrane failure.

Common Problems in Industrial RO Systems and Solutions

FAQs About Industrial RO Membranes

1. How long does an Industrial RO membrane last?
Typically 2–3 years with proper maintenance.

2. Which is better: 4040 or 8040 membrane?
8040 membranes provide higher output and lower cost per liter for large plants.

3. Which brands are best for industrial applications?
Ontoz, DOW, Dupont, and Toray are the most trusted globally.

4. How do I know when to replace my RO membrane?
If permeate TDS increases or output drops significantly, replacement is required.

5. What affects RO membrane price the most?
Brand quality, size, flow capacity, and membrane technology.

Conclusion: Which Industrial RO Membrane Is Best?

Choosing the right Industrial RO Membrane depends on your TDS level, plant size, and output requirement. For high-quality performance and long-term reliability, brands like Dupont membrane, Dow membrane, and Toray membrane offer world-class durability. For budget-friendly yet strong performance, Ontoz membrane is an excellent choice.

For the best deals, recommended product links, and trusted seller stores, refer to:

• Ocean Star Technologies
  
  
• Velient PEC India
  
  

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