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Yanmar Filter Strainer 2 ^1/2” Marine Sea Water Raw Water Filter Strainer Stainless Steel Use for Yanmar, HINO, MITSUBISHI, CATERPILLAR Marine strainer, also known as a sea strainer or raw water strainer, is a type of filtration device specifically designed for use in marine applications. It is used to filter the incoming seawater or raw water that is drawn into the cooling or plumbing systems of boats, yachts, or other marine vessels. The primary purpose of a marine strainer is to prevent debris, marine organisms, and other solid particles from entering and potentially clogging the cooling system, engine, or other components that rely on seawater for operation. By filtering the seawater, marine strainers help to maintain the efficiency and performance of marine systems, prevent overheating, and protect vital equipment from damage. Marine strainers typically consist of a housing or body that is installed in the raw water intake line. Inside the housing, there is a filter element or screen that captures and retains the debris while allowing the water to pass through. The filter element is usually made of corrosion-resistant materials, such as stainless steel or plastic, to withstand the harsh marine environment. The strainer is a type of filter used mostly on low pressure or suction side and is used to remove large contamination particles from the system. It is because the mesh screen openings in the strainer are bigger in size and are similar to those of coarse filter. If the suction condition is critical, then the strainer can be fitted on the discharge side. It will purely depend upon the make and recommendation of the manufacturer. Usually, strainers are cleaned whenever they are opened up or when the pressure drop on the filter side is high.