The Vontron ULP21-2540 reverse osmosis membrane is designed for low-pressure operation and reduces dissolved salts. It produces up to 750 GPD (2.8 m³ per day) and has a stabilized salt rejection rate of 99% and a minimum of 98.5%, under the test conditions specified for the membrane.

The spiral-wound membrane is made of aromatic polyamide and has an FRP casing. It is used with surface water, groundwater, and municipal water with a TDS below 2,000 ppm, for drinking water applications and for producing purified water for pharmaceutical, medical, and electronic uses. It fits a 2.5″ x 40″ pressure vessel.

• Quantity: 1
• Type: Reverse osmosis membrane
• Series: ULP (Ultra Low Pressure)
• Membrane material: Aromatic polyamide
• Casing material: FRP
• Production: 750 GPD (2.8 m³/day)
• Salt rejection: Stabilized 99%, minimum 98.5%
• Active area: 30 ft² (2.8 m²)
• Feed spacer thickness: 28 mil
• Operating pressure: Up to 600 psi (4.14 MPa)
• Maximum feed water temperature: 45 °C
• Maximum feed flow rate: 1.4 m³/h
• Maximum pressure drop: 15 psi (0.1 MPa) per membrane
• Free chlorine in feed water: Up to 0.1 mg/L
• SDI15: Up to 5
• Operating pH: 3–10
• Chemical cleaning pH: 2–12
• Dimensions: 1,016 x 61 mm
• Permeate tube diameter: 19.1 mm
• Permeate tube protrusion: 30.2 mm
• Suitable pressure vessel: 2.5″ x 40″
• Package contents: 1 reverse osmosis membrane