What Applications Need RO 8040 Membranes?
Thin-Film Composite
Polyamide RO Membrane
RO Membrane 8040
Industrial-grade TFC polyamide -- Model: JZ-RO-8040
Stop Replacing Filters So Often — Switch to a Better Solution
Industrial-scale RO systems require high-flow elements with consistent rejection. Undersized or poor-quality membranes limit production capacity.
Industrial-grade TFC RO membrane 8040 (8x40 inch). 1.0-1.5 m3/h flow per element, 99.5% rejection. Compatible with standard 8-inch vessels. Wide pH range (2-11) for effective cleaning.
Seawater desalination, industrial process water, boiler feed water, wastewater recycling, large-scale bottled water plants.
Desalination plant achieved 45% lower energy costs vs older generation membranes. Industrial client maintained consistent 1,200 m3/day production.
Applications
The 8040 RO membrane element is an 8-inch by 40-inch TFC polyamide membrane delivering 1 to 1.5 cubic meters per hour with 99.5 percent salt rejection. Used in large-scale industrial water treatment, boiler feed water systems, wastewater recycling, and desalination plants. High flow capacity with long service life.
Key Features
- High Flow Capacity -- 1.0-1.5 m3/h per element
- Salt Rejection -- 99.5% nominal
- Industrial Size -- 8.0" x 40" for large systems
- Large Membrane Area -- 365 ft2 active area
- High Feed Tolerance -- Up to 75 GPM feed flow
- Proven Reliability -- Standard in industrial RO systems
Technical Specifications
| Parameter | Specification |
|---|---|
| Element size | 8.0" x 40" (203.2 x 1016 mm) |
| Active membrane area | 365 ft² (34 m²) |
| Membrane type | TFC polyamide thin-film composite |
| Permeate flow | 1.0-1.5 m³/h per element |
| Salt rejection | 99.5% nominal / 99.0% minimum |
| Max operating pressure | 600 psi (4.1 MPa) |
| Max operating temperature | 45 °C (113 °F) |
| pH range | 2-11 |
| Max feed flow | 75 GPM (17 m³/h) |
| Max feed SDI | 5 |
| Free chlorine tolerance | <0.1 ppm |
| Outer wrap / connections | Fiberglass wrap; standard 8" female adapter |
How Is an “8040” Element Written?
The 8040 element is an 8-inch diameter, 40-inch long membrane. Because 8" x 40" is awkward to type, it turns up in a confusing range of forms — all of which mean this element:
| Written as | Where you see it |
|---|---|
| 8040 | The standard industry shorthand, and how we list it |
| 8" x 40" | Specification sheets and datasheets |
| 8x40 or 8 x 40 | Handwritten notes and search terms |
| 80 40 / 80-40 | A frequent typo for 8" x 40" — the quotation mark is dropped |
| 4x40 x 2 / four-inch pair | Some buyers describe it as two 4-inch elements end to end; it is not |
If you are searching for an 80 40 membrane, an 8x40, or an 8040 element, all three refer to this product. Note that the 4040 is a different element — same 40-inch length, smaller diameter, lower flow. See the 4040 vs 8040 comparison.
Price Guide
| Element | Indicative FOB China price | Notes |
|---|---|---|
| 8040 brackish water | $300 - $600 per element | Standard industrial grade |
| 8040 seawater (SWRO) | $350 - $650 per element | High-pressure construction |
| 8040 low energy | $280 - $500 per element | Lower pressure duty |
Prices are indicative FOB China and depend on grade, quantity and current membrane pricing. Request a quotation for current pricing and lead time — we reply within 24 hours.
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