Chemical Feed and Coagulant Skids Many applications require some form of pretreatment prior to filtration. A wide range of both wet and dry lime and polymer feed injection systems are available for in-line or in-tank mixing Tanks A wide range of tank and mixers sizes are available for conditioning of polymers or pretreatment. Tanks without mixers are also used as thickeners to concentrate solids prior to feeding into a filter press.Customized Precoat Filter website:http://www.hiperk.net/precoat-filter/