| 1. General Chemical-Service Seal | Virgin PTFE with a low-friction finish | Corrosion-resistant helical or U-shaped energizer | -60 to 200 °C | Up to 0.35 MPa continuous; lower pressure is preferred at high speed | Up to 5 m/s surface speed
Approximately 1,900 rpm on a 50 mm shaft | Water, dilute acids, dilute alkalis, solvents, hydraulic fluids, and many corrosive chemicals | Chemical pumps, mixers, valves, and low-to-moderate pressure rotating shafts |
| 2. High-Temperature Process Seal | Carbon-filled PTFE, typically 10–20% carbon | Elgiloy spring selected for elevated-temperature fatigue resistance | -50 to 260 °C | Up to 0.50 MPa continuous when properly supported | Up to 3 m/s surface speed
Approximately 1,150 rpm on a 50 mm shaft | Hot oils, thermal fluids, hydrocarbons, steam exposure, and many non-oxidizing process chemicals | High-temperature pumps, thermal-oil systems, and process equipment with moderate shaft speed |
| 3. Abrasion-Resistant Seal | Glass-filled PTFE, typically 15–25% glass fiber | Elgiloy energizer with a robust lip-support geometry | -50 to 200 °C | Up to 0.70 MPa continuous at reduced speed | Up to 2 m/s surface speed
Approximately 760 rpm on a 50 mm shaft | Water containing fine particles, mineral oils, dilute slurries, and mildly abrasive process fluids | Equipment exposed to contamination, particle ingress, or moderate abrasive wear |
| 4. Dry-Running and Low-Lubrication Seal | Carbon-graphite-filled PTFE, typically 15–25% filler | Elgiloy energizer with controlled lip loading | -60 to 200 °C | Up to 0.10 MPa continuous without reliable lubrication | Up to 1.5 m/s surface speed
Approximately 570 rpm on a 50 mm shaft | Dry gases, intermittent-contact applications, low-viscosity fluids, and lightly lubricated systems | Fans, blowers, actuators, and equipment where start-up or intermittent dry running is expected |
| 5. High-Pressure Low-Speed Seal | Glass-filled or carbon-filled PTFE with anti-extrusion support | Elgiloy energizer combined with a back-up ring or pressure-support feature | -40 to 200 °C | Up to 1.0 MPa continuous at low speed; verify extrusion gap and hardware design | Up to 0.5 m/s surface speed
Approximately 190 rpm on a 50 mm shaft | Hydraulic oil, water-glycol fluids, lubricating oils, and selected process liquids | Low-speed hydraulic shafts, pressure-retaining rotary equipment, and heavily loaded applications |
| 6. Food, Pharmaceutical, and High-Purity Service Seal | Virgin PTFE with a smooth, cleanable lip surface | Elgiloy energizer selected for corrosion resistance and low particle generation | -60 to 150 °C | Up to 0.25 MPa continuous | Up to 2.5 m/s surface speed
Approximately 950 rpm on a 50 mm shaft | Water, cleaning solutions, alcohol-based fluids, food oils, and compatible sanitary process media | Sanitary pumps, filling equipment, mixers, and high-cleanliness processing systems |
| 7. Cryogenic and Wide-Temperature-Service Seal | Virgin PTFE formulated for low-temperature flexibility | Elgiloy energizer for corrosion resistance and spring recovery over a broad temperature range | -196 to 150 °C | Up to 0.20 MPa continuous; pressure and speed should be reduced at cryogenic temperature | Up to 1 m/s surface speed
Approximately 380 rpm on a 50 mm shaft | Liquid nitrogen, oxygen-compatible service when properly qualified, cryogenic gases, and low-temperature hydrocarbons | Cryogenic valves, low-temperature rotating equipment, and systems with large thermal cycling |
