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Ball Valve Soft Seal Materials
The frequently used ball valve soft seal materials are as follows:
PTFE is the most basic sealing material for ball valves with excellent corrosion resistance and low friction coefficient. It can provide good sealing performance over a wide temperature range.
PEEK is a high-performance engineering plastic with excellent high temperature resistance, corrosion resistance, and wear resistance. It can be used as a substitute for PTFE as a soft sealing material for ball valves in some special working conditions.
NYLON is a synthetic thermoplastic polymer that is known for its high strength, toughness, and resistance to wear and tear. It is also resistant to many chemicals, making it a popular choice for use in harsh environments.
PCTFE is especially suitable for low temperature applications, offering excellent chemical resistance, low permeability, and good mechanical properties.
DEVLON is highly resistant to a wide range of chemicals, making it suitable for use in various industries where corrosive fluids are present. It has a low coefficient of friction, which allows for smooth operation of the ball valve and reduces wear and tear.
| Properties | PTFE | NYLON | PEEK | PCTFE | DEVLON V | |
| 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& temperature |
Cryogenic |
High Pressure& Hydrocarbon | |
