O-Ring Set for Type 56 butterfly valves (DN400). Nominal sizes DN400; part numbers by O-Ring EPDM, FKM, FKM-F, FKM-C, CSM.
| Type | O-Ring Set |
| Applicable Valves | Type 56 butterfly valves (DN400) |
| Size | DN 400 |
| O-Ring Material | EPDM, FKM, FKM-F, FKM-C, CSM |
| Part Numbers (O-Ring EPDM) | DN400 S56OSE400 |
| Part Numbers (O-Ring FKM) | DN400 S56OSV400 |
| Part Numbers (O-Ring FKM-F) | DN400 S56OSF400 |
| Part Numbers (O-Ring FKM-C) | DN400 S56OSC400 |
| Part Numbers (O-Ring CSM) | DN400 S56OSH400 |