KC-BW4040 Brackish Water RO Membranes
KC-BW 4040 Series are brackish water reverse osmosis membrane elements developed for commercial, modular, and medium-capacity industrial water treatment systems requiring stable salt rejection, reliable permeate flow, and efficient operation. Based on aromatic polyamide technology, the series provides dependable desalination performance under low-pressure brackish water operating conditions.
The standard BW type is typically used for brackish water, surface water, groundwater, and tap water treatment with feed water TDS up to approximately 5,000 mg/L. FR, HF, and ZM options are available for fouling-prone water, higher flow requirements, and higher-rejection applications, making the series suitable for flexible RO system design and compact industrial water treatment projects.
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Key Features
- Stable salt rejection for reliable permeate water quality
- Low-pressure operation for improved energy efficiency
- 4040 configuration for commercial and modular RO systems
- Multiple options available: standard, FR, HF, and ZM types
- Suitable for brackish water, groundwater, surface water, and reclaimed water
- Easy integration into OEM and system integrator projects
Application
Typical Water & Projects
- Brackish water desalination
- Surface water treatment
- Groundwater desalination
- Tap water purification
- Municipal drinking water treatment
- Industrial pure water production
- Reclaimed water and wastewater reuse
- RO concentrate recovery and concentration projects
Industries Served
- Electronics and semiconductor water treatment
- Power plant water treatment
- Chemical and pharmaceutical process water
- Petrochemical and coal chemical water treatment
- Steel and electroplating wastewater reuse
- Textile printing and dyeing wastewater treatment
- Municipal wastewater reuse projects
Technical Specifications& Performance
| Model | Stabilized Salt Rejection (%) | Effective Membrane Area (ft²(m²)) | Average Permeate Flow (GPD(m³/d)) |
|---|---|---|---|
| KC-BW-4040 | 99.60 | 85(7.9) | 2500(9.5) |
| KC-BW-FR4040 | 99.60 | 85(7.9) | 2300(8.7) |
| KC-BW-HF4040 | 99.50 | 100(9.3) | 2900(11) |
| KC-BW-ZM4040 | 99.70 | 85(7.9) | 2600(9.8) |
Standard Test Conditions
| Testing Pressure psi (MPa) | Test Solution NaCl (ppm) | Recovery (%) | Temperature (°C) | PH |
|---|---|---|---|---|
| 255(1.55) | 2000 mg/L | 15 | 25 | 7.5-8.0 |
Dimensions

Packaging
- Individually sealed plastic bag
- Single unit carton box
- Master cartons for multiple units
- Pallet available for export shipment
FAQ
Q1. How should I choose between BW, BW-FR, BW-HF, and BW-ZM types?
Standard BW is suitable for general brackish water treatment, BW-FR is used for complex or fouling-prone feed water, BW-HF is selected for higher permeate flow, and BW-ZM is used when higher salt rejection is required.
Q2. What feed water is suitable for KC-BW 4040 Series?
The standard BW type is typically used for surface water, groundwater, tap water, and brackish water with feed water TDS up to approximately 5,000 mg/L. FR or ZM types may be selected for more challenging feed water depending on system design.
Q3. Can KC-BW 4040 Series be used for reclaimed water treatment?
Yes. BW-FR models are especially suitable for reclaimed water, wastewater reuse, RO concentrate recovery, and other feed water conditions with higher fouling potential.
Q4. Is customization available?
Customization is available for membrane performance and sheet structure based on system requirements.
