X-flow AQUAFLEX 20 Ultrafiltration Membrane Membrane element datasheet AQUAFLEX HP ARTICLE CODE : 2771FB495NH General information CLEANING chemical Resistance Aquaflex 20 is an ultrafiltration module, used for production of process and potable water. Typical applications are the filtration of surface water, potable water and WWTP effluent. Mode of operation is feed-andbleed with a minor crossflow or dead-end mode with regular backwash (permeate only) and chemically enhanced backwash. Sodium Hypochlorite - Typical 200 ppm, at ≤ 40 ºC at ≥ pH 10 - Maximum 500 ppm - 250.000 ppm hours cumulative; ≥ pH 10 general Solvent resistance Hydrogen Peroxide - Typical 200 ppm, at ≤ 40 ºC - Maximum 500 ppm - 350.000 ppm hours cumulative Since the resistance of the membrane to solvents strongly depends on the actual process conditions, the indications given below should only be considered as guideline. Acids ++ Bases ++ Organic esters, ketones, ethers Aliphatic alcohols + Aliphatic hydrocarbons + Halogenated hydrocarbons -Aromatic hydrocarbons -Polar organic solvents -Oils ++ Membrane Characteristics • Hydrophilic membrane composed of a blend of polyvinylpyrrolidone and polyethersulfone • A nominal pore size of 20 nm • Structure asymmetric/microporous • High performance and a very good antifouling behaviour • Typical permeate quality SDI<3, turbidity <0,1 NTU • Membrane filtration provides 99.9999% (LOG6) reduction of bacteria (Pseudomonas diminuta) and 99.99% (LOG 4) reduction of virus (MS2 colifages) by mechanical means. EPA Est. No. 090374-NLD-001 Advanced Filtration Chlorine Dioxide - Typical 1 ppm, at ≤ 40 ºC - Maximum 2 ppm - 90.000 ppm hours cumulative; pH 11 Note: The above figures for oxidant contact represent the membrane resistance to each individual oxidizing agent. The total combined exposure for Sodium Hypochlorite and Chlorine Dioxide will be calculated as follows: Combined exposure (NaOCl + ClO2) = 2.6 x Exposure to ClO2 (in ppm hours)+ Exposure to NaOCl (in ppm hours) < 250.000 ppm hours As a good working practice and in order to maximise the lifetime of the membrane it is advised to reduce the membrane exposure to oxidising agents to a minimum. Exposure limits are also affected by temperature, pH and the presence of metals. In order not to exceed maximum exposure limits, membranes must be preserved free of any oxidising agent when the plant is stopped. Acids Hydrochloric Acid Nitric Acid Sulphuric Acid Phosphoric Acid Acetic Acid Citric Acid pH > 2 during filtration pH > 1 during cleaning Bases Sodium Hydroxide (<4%) ++ Potassium Hydroxide (<4%) + + pH < 12 during filtration pH < 13 during cleaning element specifications Membrane Diameter [mm/mil] Membrane area [m²/ft²] Feed connection D0 [mm/Inch] Element outer diameter D1 [mm/Inch] Module length L0 [mm/Inch] Permeate connection D2 [mm/Inch]

X-flow AQUAFLEX 20 Ultrafiltration Membrane Membrane element datasheet Operating Specifications Temp. range • Backwash water should be free of particulates and should be of UF permeate quality or better • Backwash pumps should preferably be made of non-corroding materials, e.g., plastic or stainless steel. If compressed air is used to pressurize the backwash water, do not allow a two-phase air/water mixture to enter the element • To avoid mechanical damage, do not subject the membrane module or element to sudden temperature changes, particularly decreasings. Bring the module or element back to...

X-flow AQUAFLEX 20 Ultrafiltration Membrane Membrane element datasheet Storage New membrane modules can be stored as supplied in the original packaging. The membrane elements contain an aqueous preservation solution of glycerine (20wt%) and sodium metabisulfite (1wt%). Membrane modules should be stored in a dry, normally ventilated place, away from sources of heat, ignition and direct sunlight. Store between 0 and 40 °C. In case of long-term storage (> 7 days), membranes should be disinfected. The membranes should be cleaned using a CEB before the disinfection step is carried out. For disinfection,...