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Description

The ULP (ultra-low pressure) series of aromatic polyamide composite membrane element was developed by E-MEM Environmental Technology Co., Ltd. It can be operated in ultra-low pressure, and reach as high permeate flow and salt rejection as regular low-pressure membrane elements can. The ULP series can be operated under approximately 2/3 of the operating pressure of regular low-pressure membrane elements, and achieves a salt rejection rate of up to *9.0%. The ULP series is suitable for the desalting treatment of water with salt concentration less than ***0 ppm, such water source as surface water, underground water, tap water and municipal water, etc., the ULP series is mainly applicable to numerous applications of various scales, such as pure water, boiler water replenishment, foodstuff processing and pharmaceutical production, etc. Testing conditions : Composition of feed ***0ppm NaCl Temperature :*5±1 ℃ PH value of feed :7.5±0.5 Recovery: *5±1 (% ) Operation pressure(psi/MPa ):**0/1.*3 Extreme Operation : Conditions Max.pressure(psi/MPa): **0/4.*4 Max.temperature: *5 ℃ Max.feed SDI*5: 5 Max.feed flow rate gpm（m3/h） :2.5inch：6.0(1.4)；4.0Iinch：*6（3.6）；8.0inch：*5（*7） Max. pressure drop of single element(psi/MPa): *0/0.*7 Free chlorine concentration of feed(ppm): <0.1 pH range of feed during operation :3～*0 pH range of feed during cleaning :2～*2