Acts as a damper along the flue gases
Is produced:- in basic design without opening;in design 1 with aperture 50 mm diameter;
in design 2 with aperture 15 mm diameter.
| Dv, mm | Dn, mm | В, mm | А, mm | Weight, kg |
| 100 | 160 | 325 | 200 | 2,6 |
| 110 | 180 | 345 | 220 | 2,98 |
| 115 | 180 | 345 | 220 | 2,93 |
| 120 | 180 | 345 | 220 | 2,91 |
| 125 | 200 | 365 | 240 | 3,39 |
| 130 | 200 | 365 | 240 | 3,37 |
| 135 | 200 | 365 | 240 | 3,33 |
| 140 | 200 | 365 | 240 | 3,37 |
| 150 | 220 | 385 | 260 | 3,79 |
| 160 | 220 | 385 | 260 | 3,78 |
| 180 | 250 | 415 | 290 | 4,44 |
| 200 | 260 | 425 | 300 | 4,67 |
| 220 | 280 | 445 | 320 | 5,1 |
| 230 | 300 | 465 | 340 | 5,6 |
| 250 | 320 | 485 | 360 | 6,08 |
| 300 | 360 | 540 | 400 | 7,25 |