The CWU-10x100B filter enables the system to quickly achieve and maintain desired oil cleanvels, and extend oil life and reduce wear of bearings. The CWU-10x100B filter is installed for the removal of the hydraulic system of each l powder and other mechanical impurities in the oil clean oil in the hydraulic system, the hydraulic system can prolong the service life; low voltage series filter with bypass valve. When the filter placed in time, the bypass valve can be turned on automatically to ensure the normal operation of the system.