1.The metal components such as filter housing and thread cover are automatically punched forming with high-quality steel. They have high dimensional accuracy, which ensure static pressure of the product and it can effective working in extreme circumstances.

2.The inside and the outside of filter housing are both dealt with phosphating and anti-rust. The filters will be no rust or corrosion.

3.The filter elements have high-quality filtration papers and helix structure, which can efficiently adsorb impurities. The initial filtration efficiency can be up to 95% which make motors have better performance.