| 摘要 |
The invention relates to a replacement air valve which can be fitted in an opening (2) made in a wall structure (1) or the like and which is provided with an air filter, a silencer made of a sound dampening board (7) fitted against the wall of opening (2) in wall structure (1) or the like, as well as a flow control means. In front of opening (2) to wall (1) is fastened a mounting flange (6) having a hole (8) therein aligned with opening (2). Air filter (9) is a tubular filter fitted with a fastening flange (10) and adapted to be inserted through hole (8) of mounting flange (6) into opening (2) in wall structure (1) or the like and to be removably fastened by its fastening flange (10) to mounting flange (6) whereby, with filter (9) secured in position, an actual filter section (22) of the filter is spaced from said sound dampening board (7). Mounting flange (6) is removably fitted with a flow control means (12). |
