| Type | Applications | |
OI OE | Metal O-Ring internal or external pressure face seal - Avoids ingress of thr working fluid into the seal - Moderate load - Moderate pressure capability | |
| OVI | Metal O-Ring internally vented and pressure-energized face seal - Moderate load - High pressure capability | |
| OVE | Metal O-Ring externally vented and pressure-energized face seal - Moderate load - High pressure capability | |
OSI OSE | Metal O-Ring internal/external spring-energized face seal and axial seal - High load - Moderate pressure capability - Lowest leakrate | |
OGI OGE | Metal O-Ring internal/external gas-energized face seal and axial seal - High load - Moderate pressure capability - Lowest leakrate | |
| CI | Metal C-Ring internal pressure face seall - Moderate load (lighter flanges & fewer bolts) - Good springback - High pressure capability | |
| CE | Metal C-Ring external pressure face seall - Moderate load - Good springback - High pressure capability | |
| CA | Metal C-Ring ,Axial seal - Close tolerance seal - For light installation loads | |
| CSI | Spring Energized Metal C-Ring, Internal pressure face seal - Lowest leakrate - High load - High pressure capability | |
| CSE | Spring Energized Metal C-Ring, Internal pressure face seal - Lowest leakrate - High load - High pressure capability | |
| CSA | Spring Energized Metal C-Ring, Axial seal - Capable of sealing higher reversing pressure than standard CA-seal | |
| Code | Material | Code | Material |
| 1 | Nickel Alloy X-750 | 6 | 304 SS, High tensile strength |
| 2 | Nickel Alloy 718 | 7 | 316 SS |
| 3 | 321 SS | 8 | Hastelloy |
| 4 | Nickel Alloy 600 | 9 | 302 SS |
| 5 | 304 SS |
| Code | Finish Material | Code | Finish Material |
| S | Silver (Ag) | L | Lead (Pb) |
| G | Gold (Au) | T | Teflon (PTFE) |
| C | Copper (Cu) | / | Unplated |
| N | Nickel (Ni) |