| 摘要 |
The invention relates to an arrangement of ventilation plants including ducts in which bag filters or similar bag-shaped filters ( 4 ) made of filter gauze are mounted. For individual adjustment of the air throughflow capacity of the filters the effective length of the filters is adjusted which, according to the invention, is carried out by an actuating member ( 23 ) which is axially pressed against the end portion of the filter ( 4 ) directly or by use of a casing of net material enclosing the filter, which casing has two ends axially fixed and is pursed up by a ring-shaped member of the actuating member ( 23 ). |
