Reverse Osmosis is a kind of film separation technology, it is to rely on through the film under the pressure of the solvent solution and the process of the solute separation. This membrane can work under an ultra low pressure to reach high permeate flow and high salt rejection rate, the salt rejection rate can up to 99.7%. Membrane material: Polyamide(PA) Norminal pore size: 0.0002-0.001micron The heavy metal ion rejection rate: for monovalent metal ion, 99%; for divalent metal ions , 50%; RO membrane element size type: 4040, 8040 Our industrial RO membrane element has the following series: 1. Low pressure-225psi RO membrane elements-LP series; 2. Extremely low pressure-100psi RO membrane elements-XLP series; 3. Fouling resistand RO membrane elements-FR series; 4. Sea water desalination RO memrbane elements-SW series;