Water contaminated with oil is an environmental hazard and lubricating oil contaminated with water is a hazard to the life of machinery.AUSFIL stage 1 filters use similar metallic and media to fuel or lube cartridges to remove particulate matter form the oil-water mix and so prolong the life of coalascer.AUSFIL stage 2 coalescing filters use a special glass media to separate the oil from the water. Flow velocity is vital to ensure successful operation and should not exceed 2m per second, resulting in a separation to 8ppm and better.