FREE-VALVE’sWcb Body Strainless Steel Ceramic Lined Knife Slurry Gate Valves are known as slurry gate valves. Its have simple structure and can cut off medium which contains solid particles and fibers, but for some very hard particles or serious erosive mediums, general metal seated knife gate valves will be washed out easily, so ceramic knife gate valves are very suitable for those mediums containing fibers and hard solid particles.