Reverse Osmosis (RO) Pre Treatment
Updated: Jun 19
Using prefilters can help protect RO membranes from fouling. Reverse osmosis (RO) is a process that is commonly employed for desalination of seawater. RO systems use a semi-permeable membrane to remove ions, molecules and unwanted contaminants and particles (salt in the case of desalination) from water.
Where RO membranes are used it is best to #prefilter the feed water to remove particles that could foul the membrane. RO membranes are constructed as a spiral wrap and so there is no easy method to remove particulates that may have entered the RO filter. Pre-filters help reduce the particulate load entering the RO filter so that the #membrane can perform at its optimum output.
We carry the Crystal MBF and Stratum™ C Series Melt blown depth filters that can be used for Pre RO filtration to prevent membrane fouling. The Crystal MBF Economical Melt Blown Depth Filter Cartridges are NSF 61 Certified with nominal micron ratings (1, 3, 5, 10, 20, 30, 50, 75). It features a multi-zone construction for a true graded pore structure, made of 100% pure polypropylene (FDA listed, USP Class VI compliant). It has continuous lengths up to 40" with similar efficiencies to competitive products for ease of replacement.
Stratum™C High Performance Melt Blown Filter Cartridge is a multi-zone melt blown depth filter with a true graded pore structure and thermally bonded fibers for high void volume and long on-stream life. Available in precise 90% removal efficiencies from 0.5 to 75 microns, with 100% polypropylene FDA listed materials of construction. All components meet USP Class VI criteria and are safe for use in pharmaceutical applications. It features a molded center core for higher temperature and pressure capability, and is free of surfactants, binders, and adhesives.