Way of filter bag use 
　　Close filtration in filter: filter bag is used with the filter, liquid is squeezed pass through the filter bag via system fluid pressure and filtration is achieved. Such application has the advantage of rapid fluid speed and high capacity, long life cycle of the filter bag. And mostly suitable for high flow closed loop filtration application.
　　

　　The major property of the filter bag is as follow:
　　Polyester -The conventional filtration fiber, ideal for anti-chemical contamination, working temperature below 70-190
　　Polypropylene –Used for liquid filtration in chemical industry, have good anti-acid and anti-caustic, working temperature lower 100-110
　　Wool-good anti-solvency , but applicable for anti-acid, anti-caustic filtration
　　Nylon—satisfactory anti-chemical (except acid), working temperature lower than 170-190
　　Fluorin—have good anti-heating and anti-chemical property, working temperature lower than 250-270.