Seat for Type 56 butterfly valves (DN400). Nominal sizes DN400; part numbers by Seat EPDM, FKM, FKM-F, FKM-C, CSM.
| Type | Seat |
| Applicable Valves | Type 56 butterfly valves (DN400) |
| Size | DN 400 |
| Seat Material | EPDM, FKM, FKM-F, FKM-C, CSM |
| Part Numbers (Seat EPDM) | DN400 S56SEE400 |
| Part Numbers (Seat FKM) | DN400 S56SEV400 |
| Part Numbers (Seat FKM-F) | DN400 S56SEF400 |
| Part Numbers (Seat FKM-C) | DN400 S56SEC400 |
| Part Numbers (Seat CSM) | DN400 S56SEH400 |