Ro Membrane – Reverse Osmosis Membrane Specifications
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- Ro Membrane – Reverse Osmosis Membrane Specifications
Features
Reverse osmosis membrane gives excellent performance for a wide variety of applications including low-pressure tapwater purification, single-pass seawater desalination, chemical processing, and waste treatment. This membrane exhibits high rejection at low pressures with very stable long-term operation.
| Solute | MW | Rejection (%) |
| Sodium fluoride NaF1 | 42 | 99 |
| Sodium chloride NaCl | 58 | 99 |
| Silica SiO2 (50 ppm) | 60 | 60 |
| Sodium bicarbonate NaHCO3 | 84 | 99 |
| Sodium nitrate NaNO3 | 85 | 97 |
| Magnesium chloride MgCl2 | 95 | 99 |
| Calcium chloride CaCl2 | 111 | 99 |
| Magnesium sulfate MgSO4 | 120 | >99 |
| Nickel sulfate NiSO4 | 155 | >99 |
| Copper sulfate CuSO4 | 160 | >90 |
| Formaldehyde | 30 | 35 |
| Methanol | 32 | 25 |
| Ethanol | 46 | 70 |
| Isopropanol | 60 | 90 |
| Urea | 60 | 97 |
| Lactic acid (pH 2) | 90 | 94 |
| Lactic acid (pH 5) | 90 | 99 |
| Lactic acid (pH 5) | 90 | 99 |
| Glucose | 180 | 98 |
| Sucrose | 342 | 99 |
| Chlorinated pesticides (traces) | − | >99 |
- Solute rejection (approximate) 2,000 ppm solute, 225 psi (1.6 MPa), 77°F (25°C), pH 7 (unless otherwise noted).
- Fluoride rejection is strongly pH dependent (about 75% at pH 5, 50% at pH 4, 30% at pH 3.5 and 0% below pH 3).
- FT30 membrane is available in a wide variety of spiral-wound configurations.
| Membrane type | Thin-film composite polyamide |
| Maximum operating pressure | 1,000 psi (6.9 MPa) |
| Maximum operating temperature | 113°F (45°C) |
| Free chlorine tolerance | < 0.1 ppm |
| pH range, continuous operation | 2 – 11 |
| pH range, short-term cleaning (30 min.) | 1 – 13 |