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Backup Rings
| Profile | Type | Standard Material | Pressure (bar) | Temp (c) | Surface speed (m/sec) |
| BU R08 | POM PTFE | - | -60 to 100 -200 to 260 | - |
| BUR09 | POM PTFE | - | -60 to 100 -200 to 260 | - |
| BUR10 | POM PTFE | - | -60 to 100 -200 to 260 | - |
| BUR11 | POM PTFE | - | -60 to 100 -200 to 260 | - |
| BUR12 | POM PTFE | - | -60 to 100 -200 to 260 | - |
| BUR13 | POM PTFE | - | -60 to 100 -200 to 260 | - |
