CIRCULAR DUCT TYPE NON-FLANGED FD-R FIRE DAMPERS
| Code | Standard Sizes | L | T | Air Flow Volume |
| ØD mm | mm | mm | m³/h | |
| 10400601 | 150 | 250 | 25 | 260 |
| 10400602 | 200 | 250 | 25 | 500 |
| 10400603 | 250 | 300 | 25 | 860 |
| 10400604 | 300 | 350 | 25 | 1.270 |
| 10400605 | 350 | 400 | 25 | 1.790 |
| 10400606 | 400 | 450 | 25 | 2.400 |
| 10400607 | 600 | 650 | 35 | 5.600 |
| 10400608 | 800 | 850 | 35 | 10.200 |
| 10400609 | 900 | 950 | 40 | 13.000 |
| 10400610 | 1.000 | 1.050 | 40 | 16.000 |
CIRCULAR DUCT TYPE NON-FLANGED FD-RF FIRE DAMPERS
| Code | Standard Sizes | L | T | Air Flow Volume |
| ØD mm | mm | mm | m³/h | |
| 10401601 | 150 | 250 | 25 | 260 |
| 10401602 | 200 | 250 | 25 | 500 |
| 10401603 | 250 | 300 | 25 | 860 |
| 10401604 | 300 | 350 | 25 | 1.270 |
| 10401605 | 350 | 400 | 25 | 1.790 |
| 10401606 | 400 | 450 | 25 | 2.400 |
| 10401607 | 600 | 650 | 35 | 5.600 |
| 10401608 | 800 | 850 | 35 | 10.200 |
| 10401609 | 900 | 950 | 40 | 13.000 |
| 10401610 | 1.000 | 1.050 | 40 | 16.000 |