Fouling phenomena are common and diverse, ranging from fouling of ship hulls, natural surfaces in the marine environment (marine fouling), fouling of heat-transfer components through ingredients contained in the cooling water or gases. Despite all of the pre-screening technology employed at raw cooling water intake sites, it is clear that additional filtration is often required to avoid macro fouling of the units served. The solution to this problem is provided by the Automatic Debris Filter. They can be supplied with wedge wire element or perforated sheet with wire mesh.