Together with tee serves as explosive valve
Depending on the boiler power between the cover flanges a membrane is installed (not supplied), which is destroyed under the required pressure performance
| Dv, mm | Dn, mm | Df, mm | Do, mm | Weight, kg |
| 350 | 420 | 462 | 444 | 3,64 |
| 400 | 460 | 502 | 484 | 3,92 |
| 450 | 520 | 562 | 544 | 4,52 |
| 500 | 560 | 602 | 584 | 4,78 |
| 550 | 620 | 662 | 644 | 5,41 |
| 600 | 660 | 702 | 684 | 5,65 |
| 650 | 720 | 762 | 744 | 6,98 |
| 700 | 760 | 802 | 784 | 7,25 |
| 750 | 820 | 862 | 844 | 7,97 |
| 800 | 860 | 902 | 884 | 8,21 |
| 900 | 960 | |||
| 1000 | 1060 |