PWG 8040BW High Rejection Water Reverse Osmosis Membrane Element 8" x 40"
Technical Resources
Technical Resources
PWG 8040BW High Rejection Water Reverse Osmosis Membrane Element 8" x 40"
PWG 8040BW High Rejection Reverse Osmosis Membrane for Brackish Water Applications
The PWG 8040BW High Rejection Water Reverse Osmosis Membrane Element 8" x 40" is a premium commercial and industrial RO membrane engineered to deliver exceptional salt rejection and reliable permeate production from brackish water supplies. Designed for high-performance reverse osmosis systems, this 8040 membrane provides excellent water quality while maintaining consistent flow rates, making it ideal for water treatment plants, food and beverage production, manufacturing, agriculture, and commercial pure water systems.
With a 99.5% nominal salt rejection and a nominal permeate flow of 11,000 GPD (1,740 L/h) under standard test conditions, the PWG 8040BW offers dependable long-term performance and excellent value for demanding water purification applications.
Key Features
- High rejection brackish water reverse osmosis membrane
- Standard 8" x 40" (8040) industry size
- 11,000 GPD (1,740 L/h) nominal permeate flow*
- 99.5% nominal salt rejection
- Suitable for commercial and industrial RO systems
- Excellent balance of productivity and water quality
- Compatible with most standard 8040 membrane pressure vessels
- Manufactured for consistent, reliable performance
- Ideal replacement membrane for many OEM systems
*Permeate flow may vary by ±20% depending on operating conditions.
Typical Applications
The PWG 8040BW membrane is suitable for:
- Commercial reverse osmosis systems
- Industrial water treatment
- Brackish water desalination
- Food & beverage processing
- Pharmaceutical water pre-treatment
- Agriculture and irrigation
- Boiler feed water preparation
- Manufacturing process water
- Water bottling plants
- Pure water production systems
Performance Specifications

| Specification | Value |
|---|---|
| Product | PWG 8040BW High Rejection Membrane |
| Membrane Size | 8" x 40" (8040) |
| Membrane Type | Brackish Water Reverse Osmosis |
| Nominal Permeate Flow | 11,000 GPD (1,740 L/h) |
| Nominal Salt Rejection | 99.5% |
| Length | 1,016 mm |
| Diameter | 200 mm |
| Connection Diameter | 28.6 mm |
| Weight | 16.4 kg |
*Performance based on 1,500 ppm NaCl solution at 25°C, 15.5 bar (225 psi), 10% recovery and pH 6.5–7.0.
Operating Limits
For optimum membrane life and performance, operate within the following limits:
| Parameter | Specification |
|---|---|
| Maximum Pressure (Fibreglass Vessel) | 42 bar (600 psi) |
| Maximum Pressure (Tape Wrap Vessel) | 21 bar (300 psi) |
| Maximum Temperature | 45°C |
| Maximum Pressure Drop | 0.7 bar (10 psi) |
| Maximum Feed Flow | 75 GPM (17.1 m³/h) |
| Free Chlorine | <0.1 ppm |
| Feed Water SDI | <5 |
| Feed Water Turbidity | <1 NTU |
| Feed Water pH | 3–10 |
| Minimum Concentrate to Permeate Ratio | 5:1 |
Reliable High-Rejection Performance
The PWG 8040BW membrane has been selected to provide an excellent combination of high salt rejection, dependable permeate production and long service life. Its advanced thin-film composite membrane technology helps reduce dissolved salts while producing consistently high-quality purified water for demanding industrial applications.
Why Choose the PWG 8040BW?
Choosing the PWG 8040BW means investing in a membrane designed for dependable performance in demanding water treatment environments. Its excellent rejection rate helps improve downstream water quality while reducing operating costs through efficient production and compatibility with standard 8040 pressure vessels.
Whether you're replacing an existing membrane or building a new reverse osmosis system, the PWG 8040BW offers a reliable solution for high-quality brackish water treatment.
Equivalent to:
- DuPont FilmTec BW30-400
- Hydranautics CPA3-8040
- Oltremare BR3-8040
- Toray TM720D-400
- LG Chem BW 400 R
- CSM RE8040-BE
- Vontron LP22-8040PRO
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