Industrial process water
RO desalination following appropriate pretreatment for the feed source.
YiFu Trading
Industrial RO Membranes: BW, LP, ULP and XLE
BW, LP, ULP and XLE spiral-wound membrane elements for industrial process water, selected reuse duties and replacement projects.
Product overview
Choose the series from the feed water and required duty
YiFu coordinates BW, LP, ULP and XLE reverse-osmosis membrane supply through qualified Chinese manufacturing partners. The verified catalogue includes 2521, 2540, 4021, 4040, 8040 and 8040-440 formats; 4040 and 8040 are the most common industrial procurement requests.
The series names do not form a universal performance ranking. Each series has its own supplier test basis. Feed-water analysis, temperature, recovery, required permeate quality, pressure-vessel format and current operating data must be reviewed before quotation or replacement selection.
Application fit
Typical roles and use cases
These are potential roles, not guaranteed performance claims. The complete process and verified product limits must be reviewed.
Wastewater reuse
Advanced treatment after upstream solids, organics and biological risks are managed.
Replacement elements
Review of current model, vessel size, array and operating data.
Selection
What needs to be confirmed
- Full ionic water analysis
- SDI, turbidity and solids control
- TOC/COD and biological fouling risk
- Temperature, pH and oxidant exposure
- Design permeate flow and recovery
- Concentrate disposal limits
- Antiscalant and cleaning strategy
- Pressure vessel and current element dimensions
Important
Use approved supplier data
Published nominal performance is measured under defined test conditions and is not the same as site performance. System projection and water analysis are required.
Technical parameters
Specifications to confirm before supply
| Parameter | Published value | Selection note |
|---|---|---|
| Verified series | BW / LP / ULP / XLE | Use the original series and complete model identifier in inquiries and orders. |
| Verified element formats | 2521 / 2540 / 4021 / 4040 / 8040 / 8040-440 | The selected format does not by itself establish performance or replacement compatibility. |
| Priority industrial formats | 4040 / 8040 / 8040-440 | Confirm vessel, connectors, seals, exact variant and available installation clearance. |
| Maximum operating pressure | 600 psi (4.14 MPa) | Supplier maximum limit for BW, LP, ULP and XLE; it is not a recommended setpoint. |
| Maximum inlet temperature | 45°C | Confirm the operating temperature range and projection for the selected duty. |
| Reference pH limits | Continuous operation 3–10; chemical cleaning 2–12 | A pH range is not a cleaning procedure; chemical, concentration, temperature, time and frequency require approval. |
| Pretreatment reference limits | Turbidity ≤1.0 NTU; SDI15 ≤5; free chlorine ≤0.1 mg/L | A full feed-water analysis and pretreatment review remain required. |
| Maximum pressure drop per element | 15 psi (0.1 MPa) | Review the complete array, spacer, fouling condition and operating flow. |
Verified supplier reference data
4040 and 8040 industrial RO series comparison
Average yield, rejection and recovery below retain the supplier's definitions and test basis. Different feed concentrations and test pressures prevent a direct cross-series performance ranking.
| Original model | Effective area | Average yield | Salt rejection | Supplier test basis |
|---|---|---|---|---|
| BW-4040 | 78 ft² (7.2 m²) | 2,500 GPD | 99.7% | 2,000 ± 50 mg/L NaCl; 225 psi |
| BW-8040 | 400 ft² (37 m²) | 11,000 GPD | 99.7% | 2,000 ± 50 mg/L NaCl; 225 psi |
| BW-8040-440 | 440 ft² (41 m²) | 12,100 GPD | 99.7% | 2,000 ± 50 mg/L NaCl; 225 psi |
| LP-4040 | 78 ft² (7.2 m²) | 2,600 GPD | 99.2% | 1,500 ± 50 mg/L NaCl; 150 psi |
| LP-8040 | 400 ft² (37 m²) | 11,000 GPD | 99.2% | 1,500 ± 50 mg/L NaCl; 150 psi |
| LP-8040-440 | 440 ft² (41 m²) | 12,000 GPD | 99.2% | 1,500 ± 50 mg/L NaCl; 150 psi |
| ULP-4040 | 78 ft² (7.2 m²) | 2,600 GPD | 98% | 1,000 ± 50 mg/L NaCl; 110 psi |
| ULP-8040 | 400 ft² (37 m²) | 11,000 GPD | 99% | 1,000 ± 50 mg/L NaCl; 110 psi |
| ULP-8040-440 | 440 ft² (41 m²) | 12,000 GPD | 99% | 1,000 ± 50 mg/L NaCl; 110 psi |
| XLE-4040 | 78 ft² (7.2 m²) | 2,600 GPD | 98.5% | 500 ± 20 mg/L NaCl; 100 psi |
| XLE-8040 | 400 ft² (37 m²) | 11,000 GPD | 98.5% | 500 ± 20 mg/L NaCl; 100 psi |
| XLE-8040-440 | 440 ft² (41 m²) | 12,000 GPD | 98.5% | 500 ± 20 mg/L NaCl; 100 psi |
All listed tests use 25 ± 1°C and pH 7–8. The supplier's element-table recovery is 15% for these models; it is not the RO system recovery. Average yield is a laboratory reference, and salt rejection is not stated as a minimum guarantee.
Replacement and quotation
Confirm the full model and system interface
For a replacement review, provide the original brand and complete model, quantity, element and vessel photos, array, connector or adaptor details, feed and permeate history, and destination country.
The 4040 or 8040 format is only an initial screening point. Use the 4040 RO membrane selection and quotation guide to prepare the technical and purchasing information.
FAQ
Common selection questions
Can RO treat industrial wastewater directly?
Usually not without substantial pretreatment. Solids, organics, hardness, metals, silica, oils and biological activity must be controlled.
Can a different RO brand replace the current element?
Potentially, if dimensions and performance characteristics are compatible and the system is re-evaluated.
Does higher recovery always improve the project?
Higher recovery reduces concentrate volume but increases concentration, scaling and pressure risks. The optimum is application-specific.
Send your application for a preliminary review
Share water data, flow, treatment objective or an existing membrane model. YiFu will coordinate the next technical questions.
Industrial RO procurement
Define the RO duty before selecting an element
Process-water, wastewater-reuse and replacement projects need different feed review, system projection and technical confirmation.
Process water and BWRO
Confirm the full ionic analysis, temperature, required permeate, recovery basis, pressure-vessel format and operating constraints.
Review RO pretreatment requirements →Wastewater reuse RO
Verify upstream solids, organics, biological risk and concentrate management before selecting the membrane element.
Review water-reuse treatment trains →Industrial RO replacement
Send the existing model, vessel, array, feed and permeate history; do not assume compatibility from element dimensions alone.
Review the industrial wastewater context →For high-salinity desalination duty, use the seawater RO membrane page.