The BW 4040 RO membrane is a 4-inch by 40-inch spiral-wound element used in brackish water RO systems. It is the size most small and mid-size RO plants use as a replacement when output drops or the salt in the product water starts to rise. Water Treatment LLC stocks the BW 4040 membrane in Dubai and delivers across the UAE. Send us your system details and we will confirm the fit before you order.
Key Features
- Thin film composite membrane for brackish water, up to about 5,000 ppm TDS
- Stable salt rejection of 99.5% (minimum 99.3%)
- Handles feed pressure up to 600 psi
- Works in pH 3 to 10 during continuous operation
- Fits standard 4040 pressure vessels
- Suited to systems with multiple elements in one housing
Technical Specifications
| Specification | Details |
| Model | BW 4040 (JBW-4040) |
| Active Membrane Area | 90 ft² (8.4 m²) |
| Permeate Flow | 2,400 GPD (9.1 m³/day) |
| Stable / Minimum Rejection | 99.5% / 99.3% |
| Test Conditions | 225 psi, 25°C, 2,000 ppm NaCl, pH 7.5, 15% recovery |
| Max Working Pressure | 600 psi (4.14 MPa) |
| Max Feed Flow | 16 GPM (3.6 m³/h) |
| Max Feed Temperature | 45°C |
| Max Feed SDI15 | 5 |
| Chlorine in Feed | Below 0.1 ppm |
| pH Range | 3 to 10 continuous, 2 to 12 during cleaning |
| Max Pressure Drop | 15 psi per element, 50 psi per vessel |
Applications
- Replacing worn membranes in brackish water RO plants
- Drinking water and process water systems in food and beverage units
- Boiler feed and power station water lines
- Groundwater and well water treatment
Why Choose Us
A membrane lasts longer when the water reaching it is clean, so we don’t just sell the element. We can supply the activated carbon and PP cartridges for pre-treatment, plus anti-scalant chemicals to slow down scaling. If your plant is losing output and you aren’t sure the membrane is the cause, our team can check it through our RO plant maintenance service before you buy a new one.
Buy BW 4040 RO Membrane in UAE
To buy a 4040 RO membrane in Dubai or anywhere in the UAE, send us your plant model, feed water TDS and the number of elements on WhatsApp or email. We will confirm the right membrane and send the price and delivery time. We also supply RO membranes in other sizes and FRP housings if you need a vessel together with the element.
Frequently Asked Questions
What is the price of a BW 4040 RO membrane in the UAE?
The BW 4040 membrane price depends on the quantity and delivery location. Send us your plant model, feed TDS, and number of elements for a quote and delivery time.
How do I know if my RO plant needs a new 4040 membrane?
Common signs are lower permeate output, rising TDS in the product water, or higher feed pressure. Send us your plant details and we will advise whether the membrane is the cause or if cleaning will fix it.
Will a BW 4040 membrane fit my existing RO system?
It fits standard 4040 pressure vessels, but the brand and connectors can differ. Share your current membrane model or a photo and we will confirm the fit before you order.
Can I buy a 4040 RO membrane in bulk for my plant in Dubai?
Yes, we supply single elements and bulk quantities for plants with multiple membranes per housing. Contact us for bulk pricing and delivery.
Do you also supply antiscalant, pre-filters, and FRP housings in the UAE?
Yes, we supply antiscalant, activated carbon and PP cartridges, and FRP housings along with the membrane. This helps you buy everything for your RO plant from one supplier.
