Description VONTRON MEMBRANE Independently developed by VONTRON, the RO element ULP1812-50 is designed for the treatment of low-salinity water resources such as tap water, well water, etc. Working under extra-low pressure, it is applicable to water purifying devices in residence, hospital, and laboratory. About Vontron Membranes Dimensions: millimeter (inch) Properties and Testing Conditions Model Average Permeate (GPD) Stable Rejection (%) Min. Rejection (%) ULP1812-50 50 97.5 96 Notes: Permeate of a single element may vary within [-20%] ~ [ 20%] Testing Conditions: Testing Pressure: 60 psi (0.41MPa) The temperature of Testing Solution: 25°C The concentration of Testing Solution (NaCl): 250 ppm the pH of Testing Solution: 6.5~8.5 Recovery of Single Element: 15% Properties and Testing Conditions Model ULP-1812-50  ULP-1812-75 ULP- 1812-100 Perfor-mance Stable Desalination % 97 97 97 Min. Desalination % 96 96 96 Mean Permeable Flow GPD (L/d) 50 (204) 75 (281) 100 (380) Active Film Area ft2(m2) 3.5 (0.32) 4.2 (0.38) 5.0 (0.46) Test Conditions Pressure 65psi (0.45Mpa) Water Temp. 25℃ Concentration(NaCl) 500ppm Water PH 6.5 to 7.5 Recovery Rate % 15 Operating Conditions Max. Operating Pressure 200psi (2.0Mpa) Max. Feed Water Temp. 45℃ Max. Feed Water Silt Density Index (SDI) 5 Feed Water Chlorine Tolerance < 0.1 mg/l Feed Water PH Range, Continuous Operation 3 to 10 Feed Water PH Range, Short-Term Cleaning 2 to 11 Max. Pressure Drop of Single Membrane 10psi (0.07Mpa)