The filter element separates solid particles in liquid or gas, or makes sufficient contact with different substances to accelerate the reaction time, which can protect the normal operation of the equipment or the cleanliness of the air. When the fluid enters the filter element with a certain size filter, the impurities are blocked. And the cleaned flow passes through the filter element. The liquid filter element allows the liquid (including oil, water, etc.) to clean the contaminated liquid to the state required for production and living, that is, to achieve a certain degree of cleanliness of the liquid. Hydraulic oil Filter application 1. Petrochemical: separation and recovery of refining, chemical production and intermediate products 2. Metallurgy: used for filtration of hydraulic systems of rolling mills and continuous casting machines 3, textile: purification and uniform filtration of polyester melt in the drawing process 4. Electronics and pharmaceuticals: pre-treatment filtration of reverse osmosis water and deionized water, pretreatment filtration of washing liquid and glucose 5. Thermal power and nuclear power: purification of gas turbine, boiler lubrication system, speed control system, bypass control system oil, purification of feed water pump, fan and dust removal system