... pressure difference of semi permeable membrane,it is called reverse osmosis,as it is counter to natural penetration direction, ... Different materials have different osmotic pressures,The reverse osmosis method to adopt larger osmotic pressures is used to ... -5000A5.013>99.5DN50DN40DN402600x900x20003200RO-10000A1026>99.5DN63DN50DN503600x1200x17005000 Reverse Osmosis System &water treatment ...