Explore BOKAWATER BW, FR, ULP and SW membrane families. Compare model specifications, membrane area, flow and test conditions for your next system or replacement.
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BK-BW-4040 · 2500 GPD (9.5 m³/d)
For brackish-water treatment and industrial water preparation. Compare the membrane area, test flow and salt rejection with your feed-water analysis and installed vessel arrangement.
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BK-BW-8040 · 10500 GPD (39.7 m³/d)
For brackish-water treatment and industrial water preparation. Compare the membrane area, test flow and salt rejection with your feed-water analysis and installed vessel arrangement.
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BK-BW-4040FR · 2000 GPD (7.6 m³/d)
A fouling-resistant membrane option for reuse-water and challenging feed-water enquiries. Its catalog uses a 34 mil spacer; selection still requires a pretreatment and cleaning review.
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BK-ULP-8040MR-2 · 10500 GPD (39.7 m³/d)
An ultra-low-pressure RO element for lower-salinity water preparation. Compare its stated test pressure and feed concentration with the BW range before selecting a membrane for an existing pump and vessel layout.
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BK-C-SW-4040 · 1600 GPD (6.1 m³/d)
A seawater RO element with catalog performance stated under seawater-strength salt and boron test conditions. Evaluate the membrane together with the high-pressure system, intake pretreatment and product-water target.
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BK-C-SW-400 · 7500 GPD (28.4 m³/d)
A seawater RO element with catalog performance stated under seawater-strength salt and boron test conditions. Evaluate the membrane together with the high-pressure system, intake pretreatment and product-water target.
View product ↗| Membrane model | Active membrane area | Permeate flow at test conditions | Stabilized salt rejection | Test pressure | Test solution |
|---|---|---|---|---|---|
| BW-4040 | 85 ft² (7.9 m²) | 2500 GPD (9.5 m³/d) | 99.60% | 225 psi (1.55 MPa) | 2000 mg/L NaCl 25 °C · pH 7.5–8.0 · 15% |
| BW-8040 | 400 ft² (37.2 m²) | 10500 GPD (39.7 m³/d) | 99.60% | 225 psi (1.55 MPa) | 2000 mg/L NaCl 25 °C · pH 7.5–8.0 · 15% |
| BW-4040FR | 78 ft² (7.3 m²) | 2000 GPD (7.6 m³/d) | 99.60% | 225 psi (1.55 MPa) | 2000 mg/L NaCl 25 °C · pH 7.5–8.0 · 15% |
| ULP-8040MR-2 | 440 ft² (40.9 m²) | 10500 GPD (39.7 m³/d) | 99.60% | 150 psi (1.03 MPa) | 1500 mg/L NaCl 25 °C · pH 7.5–8.0 · 15% |
| SW-4040 | 90 ft² (8.4 m²) | 1600 GPD (6.1 m³/d) | 99.8% | 800 psi (5.52 MPa) | 32000 mg/L NaCl + 5 mg/L B (H₃BO₃) 25 °C · pH 7.5–8.0 · 8% |
| SW-400 | 400 ft² (37.2 m²) | 7500 GPD (28.4 m³/d) | 99.8% | 800 psi (5.52 MPa) | 32000 mg/L NaCl + 5 mg/L B (H₃BO₃) 25 °C · pH 7.5–8.0 · 8% |
These are single-element catalog test values, not a guaranteed system output. Compare flow and rejection only with their stated pressure, feed solution, temperature and recovery. Confirm dimensions, connections and the system projection before replacement.
Complete the blank project-value column and share the file with your enquiry. This is a planning worksheet, not an equipment specification.
| Parameter / interface | Unit / format | Why it matters |
|---|---|---|
| Existing model and manufacturer | Nameplate / model | Identifies the installed reference without assuming equivalence. |
| Element and connection dimensions | Drawing / dimensions | Checks vessel, adapters, product-water tube and seals. |
| Feed-water analysis and temperature | Report / °C | Defines the water conditions for a system projection. |
| Permeate duty and quality target | m³/h / specification | Separates the required system duty from catalog element flow. |
| Array, pressure and operating history | Layout / pressure / records | Supports hydraulic review and diagnosis of existing performance. |
| Element quantity and delivery | Pieces / destination | Defines the supply quantity and shipping requirement. |
| Pretreatment and cleaning history | Process / service records | Supports fouling assessment and an appropriate operating plan. |
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RO membrane selection: compare the test conditions before replacing an element ↗A useful enquiry can start before every parameter is known. Tell us what you know and where engineering input is needed.