The frequently used ball valve soft seal materials are as follows:
1.PTFE (Polytetrafluoroethylene):Known for its high chemical resistance and low friction, PTFE is a widely used material for ball valve seals. Its ability to resist a broad spectrum of chemicals makes it ideal for corrosive environments. Additionally, PTFE’s low friction properties contribute to smoother operation and reduced wear over time.
2.NYLON:Nylon is favored in high-pressure applications due to its strength, flexibility, and abrasion resistance. It’s particularly effective in conditions requiring resilience to pressure while maintaining an excellent seal. Nylon’s toughness and resistance to wear make it an ideal choice for industrial applications with high operating pressures.
3.PEEK (Polyether Ether Ketone):Known for its exceptional mechanical strength and heat resistance. This high-performance thermoplastic is suitable for high-pressure applications and is often selected for demanding conditions, where typical soft seals may fail.
4.PCTFE (Polychlorotrifluoroethylene): PCTFEis a high-performance soft sealing material frequently, particularly valued for its exceptional chemical resistance, low permeability, and high dimensional stability.
5.DEVLON: DEVLON is a durable, high-strength polyamide material widely used for ball valve soft seals, especially in high-pressure and abrasive environments. Known for its excellent wear resistance, low friction, and ability to withstand pressures and temperatures from -40°C to 120°C, DEVLON is ideal for demanding applications like oil and gas.
| Properties | PTFE | NYLON | PEEK | PCTFE | DEVLON | |
| Temperature Range(℃) | -100~150 | -50~80 | -100~250 | -196~150 | -40~120 | |
| Pressure Rating(LB) | 150~300 | 600~1500 | 600~2500 | 150~300 | 600~1500 | |
| Mechanical Property | Hardness(D) | 58 | 72 | 88 | 85 | 78 |
| Tensile Strength(MPa) | 14~34 | 55.2 | 134 | 35.9 | 79.9 | |
| Tensile longation(Break,%) | 350 | 250 | 2.2 | 150 | 5.4 | |
| Physical Property | Specific Gravity(g/cm³) | 2.17 | 1.02 | 1.44 | 2.12 | 1.14 |
| Water Absorption 24hrs（%） | 0.00 | 1 | 0.06 | 0.00 | 0.1 | |
| Water Absorption saturation | ＜0.01 | 1.60 | 2 | ＜0.01 | 3 | |
| Service Application | Chemical& Low temperature | High Pressure& Hydrocarbon | High Pressure& Hydrocarbon | Cryogenic | High Pressure& Hydrocarbon | |
