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
  1. Solute rejection (approximate) 2,000 ppm solute, 225 psi (1.6 MPa), 77°F (25°C), pH 7 (unless otherwise noted).
  2. 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).
  3. FT30 membrane is available in a wide variety of spiral-wound configurations.

Operating Limits

Membrane typeThin-film composite polyamide
Maximum operating pressure 1,000 psi (6.9 MPa)
Maximum operating temperature113°F (45°C)
Free chlorine tolerance < 0.1 ppm
pH range, continuous operation2 - 11
pH range, short-term cleaning (30 min.)1 - 13