| Reference | Box units | measurement | Nominal diameter | note | Use | Category | DN (mm) | S (mm) | L1 (mm) | L2 (mm) | L3 (mm) | L4 (mm) | RAL | Flaps |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1552591 | 1 | 250 | 250 | Plastic flap | The non return valve can be installed both indoors and out. Installation that allows easy inspection, inside an accessible recess, in an inspection pit, or in sight installation on a pipelin | Non-return valves | 250 | 6,2 | 130 | 102 | 520 | 374 | RAL 8023 | TYPE 1 |
| 1553091 | 1 | 315 | 315 | Plastic flap | The non return valve can be installed both indoors and out. Installation that allows easy inspection, inside an accessible recess, in an inspection pit, or in sight installation on a pipelin | Non-return valves | 315 | 7,7 | 160 | 125 | 615 | 440 | RAL 8023 | TYPE 1 |
