When it comes to sealing solutions in demanding industrial environments, few materials offer the versatility and reliability of PTFE-based seals (also known as PTFE composite seals or PTFE V-packings). However, choosing the right PTFE material formulation is not one-size-fits-all. The correct seal material depends heavily on operating conditions like temperature, pressure, speed, and chemical exposure.
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In this article, we share practical advice on selecting the most suitable PTFE seal material for your specific application—so your systems perform reliably and efficiently.
Polytetrafluoroethylene (PTFE) is known for:
✅ Excellent chemical resistance
✅ Wide temperature tolerance (up to 260°C)
✅ Low friction and excellent dry-running capabilities
✅ Non-stick and anti-aging properties
These features make PTFE seals ideal for applications in oil & gas, hydraulics, food processing, semiconductors, and aerospace.
PTFE alone can withstand high temperatures up to 260°C, but certain fillers improve heat resistance and thermal conductivity. If your system operates in:
Extreme heat → Choose PTFE + Graphite or PTFE + Bronze
Cryogenic conditions → Use pure PTFE or PTFE + glass fiber
For high-pressure sealing (e.g., in hydraulic cylinders), reinforced materials offer better structural stability.
Medium pressure → PTFE + Glass Fiber
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High pressure → PTFE + Bronze or PTFE + Carbon
Ultra-high pressure → Multi-component seals like Spring-energized PTFE seals
When exposed to acids, bases, or aggressive solvents:
Use virgin PTFE or PTFE + silica
Avoid metallic fillers in highly corrosive media
Always check the chemical compatibility chart to ensure the material won’t degrade prematurely.
For rotary or reciprocating motion, low friction and anti-wear properties are key.
Rotating shafts → PTFE + MoS₂ or PTFE + Carbon
Reciprocating motion → PTFE + Glass or PTFE + Polymer blends
PTFE is inherently soft, but combining it with fillers enhances durability.
Long life cycles → PTFE + Carbon or PTFE + Bronze
Abrasive environments → PTFE + Ceramic or PTFE + PEEK
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