| 摘要 |
A filter assembly comprises a metal housing (10, 50) containing a casing (11, 51) encapsulating a filter element (12, 52). The casing (11, 51) includes an inlet (27, 80) and an outlet (29, 78) for feeding fluid to the filter element (12, 52) and for removing filtered fluid. The casing (11, 51) is self-supporting. In a second aspect, the filter element (12, 52) has an open centre filled by a member (14, 54) that reduces the volume of the centre. A head member (22, 62) is provided that forms an end cap for the filter element and includes a first passage leading to the centre of the filter element and a second passage leading to an exterior surface of the filter element. The filter element may comprise a filter member (52) having a first end closed by a head member (62) providing first and second passages (74, 81) with the second end being closed by an end cap (53), the head member (62) including a part which is substantially the same as the end cap (53) and has a hole (66) leading to the first passage (78). |
