🔷 What is packing (gland packing)?

Gland packing is a sealing material used in valve stems, pumps, and rotating equipment to prevent fluid leakage to the outside environment.

In industrial applications, the two most common types are:

• Graphite packing
• PTFE packing (Teflon packing)

👉 Each type has different properties and is suitable for different operating conditions.

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⚙️ What is graphite packing?

Graphite packing is made from braided or compressed graphite fibers with excellent high-temperature resistance.

📌 Key features:

• Very high temperature resistance (up to ~450–600°C)
• High pressure resistance
• Self-lubricating properties
• Suitable for steam, oil, and heavy industrial applications

👉 Commonly used in steam systems and power plants

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⚙️ What is PTFE packing?

PTFE packing (Teflon packing) is made from polytetrafluoroethylene (PTFE), a chemically inert material.

📌 Key features:

• Excellent chemical resistance
• Very low friction coefficient
• Moderate temperature resistance (~200–260°C)
• Good sealing performance in corrosive environments

👉 Commonly used in chemical, water, and food industries

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📊 Comparison: Graphite Packing vs PTFE Packing

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🏭 When should you use graphite packing?

Choose graphite packing when:

✔️ High-temperature systems

• Steam systems
• Boilers
• Power plants

✔️ High-pressure environments

✔️ Oil & gas and heavy industries

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🏭 When should you use PTFE packing?

Choose PTFE packing when:

✔️ Corrosive chemical environments

• Acids and alkalis
• Solvents

✔️ High corrosion resistance is required

✔️ Moderate temperature systems

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⚠️ Common mistakes

• Using PTFE packing in high-temperature steam systems → deformation and failure
• Using graphite packing in highly corrosive chemical environments → reduced lifespan
• Ignoring actual operating temperature conditions

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🔥 Quick selection tips

👉 High temperature & high pressure → choose Graphite packing
👉 Chemical resistance → choose PTFE packing

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🏁 Conclusion

Graphite packing and PTFE packing serve different purposes:

• Graphite = high temperature and high-pressure performance
• PTFE = excellent chemical resistance

👉 Choosing the right packing helps:

• Reduce leakage
• Extend equipment life
• Ensure stable system operation

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📞 Contact Information

Phuc Minh Engineering Co., Ltd (PM-E) specializes in supplying industrial packing, valves, and piping equipment according to international standards.

• 🌐 Website: pm-e.vn
• 📧 Email: info@pm-e.vn
• 📱 Hotline: +84 907 450 506 – +84 902 720 814 – +84 902 800 728