... felt made of folded tubular filter ,has the advantages of a large capacity , high filter precision , small pressure drop ... filtration, raw oil, oil filter;- Dry gas desulphurization device, gas filter,deficient liquid, solution filter;- Oil blending lubricant filtering. ... propylene, butadiene, acetylene, benzene, xylene and otherraw material filter;- Filters such as acetone, ethanol and glycerol. The ...