DFB series filter is of high pressure type, and used in the pressure line of hydraulic system. It can remove all the contaminants from the hydraulic system. The element of this series is made of glass fibre. it has high efficiency and filtration, large dirt capacity and low initial pressure drop. Beta ratio is over 200.
It has two protection equipment which are by-pass valve and contamination indicator. The indicator will act when the pressure drop across element attains adjustable pressure. The element should be cleaned or changed in time.