| 摘要 |
A filter cartridge (60, 160) comprising a filter wall (63, 163) having a tubular shape and at least a support plate (61, 161) fixed to an end of the filter wall (63, 163), characterized in that a by-pass conduit (66, 166) is fashioned in the support plate (61, 161), which by-pass conduit (66, 166) is designed to place an internal volume (64, 164) delimited by the filter wall (63, 163) in communication with outside, which by-pass conduit (66, 166) is intercepted by a valve (70, 170) which is associated to the support plate (61, 161) in an out-of-center position with respect to a longitudinal axis (A, A2) of the filter wall (63, 163), the valve (70, 170) comprising an internally-hollow valve body (71, 171), which is provided with a hole (72, 172) suitable for setting the bypass conduit (66, 166) in communication with the internal cavity of the valve body (71, 171), an obturator (73, 174) housed in the internal cavity of the valve body (71, 171), and an elastically-acting element (75, 180) suitable for pressing the obturator (73, 174) against a valve seating (74, 179) such as to close the hole (72, 172), the valve (70, 170) being housed internally of a seating (67, 167) afforded in the support plate (61, 161). |
