Vontron Reverse Osmosis Membrane ULP21-4040 The RO membrane ULP21-4040 is an ultra-low pressure reverse osmosis element designed for efficient and reliable water purification. It is widely used in commercial and light industrial systems where energy efficiency and stable performance are required. Because this membrane operates effectively at lower feed pressures, it helps reduce pump load and operating costs. In addition, its standard 4040 size allows easy installation in most reverse osmosis housings. Key Features High Flow Capacity and Salt Rejection Average permeate flow of approximately 2400 GPD (≈ 9.1 m³/day) under standard testing conditions (25 °C, 150 psi, NaCl feed). Stable salt rejection rate around ~99% for effective desalination and purification. Ultra-Low Pressure Performance Designed to operate at reduced feed pressures (about two-thirds of regular low-pressure elements), which can lower energy consumption and pump size requirements. Large Active Membrane Area Active membrane area of approximately 90 ft² (~8.4 m²) for high throughput and efficient filtration. Broad Compatibility Standard 4″×40″ size matches most RO housings for easy integration and retrofitting. Suitable for surface, municipal, and underground water sources with TDS below ~2000 ppm. Technical Specifications Specification Details Model ULP21-4040 Membrane Type Ultra-Low Pressure TFC RO membrane Average Permeate Flow ~2400 GPD (≈ 9.1 m³/day) Stable Salt Rejection ~99% Active Membrane Area ~90 ft² (~8.4 m²) Spacer Thickness ~28 mil Max Feed Pressure Up to ~600 psi (~4.14 MPa) Max Feed Temperature Up to ~45 °C SDI (Silt Density Index) ≤ 5 Free Chlorine Tolerance < 0.1 ppm pH Range (Operation) ~3-10 pH Range (Cleaning) ~2–12 Dimensions 4″ × 40″ (diameter × length) Benefits Energy-efficient operation: Lower feed pressure requirements help cut operating costs. High-quality water: Near-99% salt and contaminant rejection supports safe drinking and industrial process water. Easy integration: Standard 4040 size fits commonly used RO housings without modification. Durable performance: Built to handle a wide range of feed water sources within specified limits. Typical Applications Upgrading or retrofitting existing RO systems Commercial and light industrial water purification Drinking water systems for high-capacity use Boiler feed water pre-treatment Food and beverage processing water treatment
