The XFluor® compound engineered for the most demanding conditions. PFX8050 is a black 75 Shore A FFKM designed for sealing systems exposed to extreme temperatures and critical fluids, with a stated application range from -10 to +320 °C and an extensive test programme covering steam, Skydrol LD4, oils and fuels.
Use the configurator to choose the correct material, size code, internal diameter and cross-section.
Open configuratorXFluor® PFX8050 is the premium solution in this selection for high-temperature resistance. It has been developed for O-rings and sealing components used where heat, steam and aggressive fluids challenge the reliability of conventional materials.
The value of PFX8050 lies not only in its stated maximum temperature, but also in the depth of its technical test programme: compression set testing up to 300 °C, dry-heat ageing for up to 1,000 hours, steam exposure up to 300 °C and immersion in Skydrol LD4, Reference Oil 300 and Fuel B. A performance profile developed for industries where operating continuity and sealing reliability are essential.
| Property | Test method / condition | Value |
|---|---|---|
| Polymer base | ISO 1629 | FFKM – perfluoroelastomer |
| Colour | – | Black |
| Hardness | ASTM D2240 | 75 ± 5 Shore A |
| Specific gravity | ASTM D297 | 1.96 ± 0.02 g/cm³ |
| Modulus at 50% | ASTM D1414, S2 specimen | ≥ 7 MPa |
| Modulus at 100% | ASTM D1414, S2 specimen | ≥ 13 MPa |
| Tensile strength | ASTM D1414, S2 specimen | ≥ 14 MPa |
| Elongation at break | ASTM D1414, S2 specimen | ≥ 150% |
| Compression set, 72 h | ASTM D395 B, 13 × 6.3 mm specimen; 100 / 200 / 250 / 275 / 300 °C | ≤ 25 / 22 / 25 / 35 / 45% |
| Compression set, 336 h at 200 °C | ASTM D395 B, 13 × 6.3 mm specimen | ≤ 35% |
| TR10 | ASTM D1329 | -1 °C |
| Tg, DSC onset | ASTM D3418-15 | -7 °C |
| Skydrol LD4 | ASTM D471, 72 h at 125 °C | Δ volume +4.6%; Δ hardness -4 points |
| Reference Oil 300 | ASTM D471, 72 h at 175 °C | Δ volume +0.6%; Δ hardness -2 points |
| Aromatic Fuel B | ASTM D471, 72 h at 23 °C | Δ volume +0.2%; Δ hardness +1 point |
| Steam | 168 h at 260 / 300 °C; O-ring #214 | Δ hardness 0 / 0 points; compression set ≤ 40 / 50% |
| Stated application temperature range | Application | -10 to +320 °C |
Download the attached technical data sheet for the complete test matrix. For applications involving high temperatures, steam, fuels, lubricants or hydraulic fluids, contact NEXA and share your operating conditions: our team can support you with compound selection and technical sealing assessment.
