In Hydraulics&Pneumatics circuit and system, filtering technology cannot be emphasized more. Also, this technology is applied to steel, heavy industry, paper making, construction machine, cement, automobile, fuel refinery and ship building. Especially, more than 80% of trouble caused in Hydraulics system due to wrong filtering application. Lubricant management and filtering choose technology is very important. To maximize productivity, increase durability of equipments and lowering initial cost requests right filtering.