Spiral Wound Gasket vs PTFE Gasket: What’s the Difference and Which One Should You Choose?

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Spiral Wound Gasket vs PTFE Gasket: What’s the Difference and Which One Should You Choose?

15/04/2026

🔷 Overview of industrial sealing gaskets

In piping and valve systems, gaskets play a critical role in sealing flange connections and preventing fluid leakage.

The two most commonly used types are:

Spiral Wound Gasket (metallic gasket)
PTFE Gasket (Teflon gasket)

👉 Each type is suitable for different pressure, temperature, and chemical conditions.

⚙️ What is a spiral wound gasket?

A spiral wound gasket is made from:

Metallic strips (such as stainless steel 304, 316)
Soft filler materials (graphite or PTFE)

📌 Key features:

Excellent high-pressure and high-temperature resistance
Good elasticity, compensates flange irregularities
Suitable for RF and RTJ flanges
High sealing performance in harsh environments

👉 Commonly used in high-pressure and high-temperature systems

⚙️ What is a PTFE gasket?

A PTFE gasket is made from Polytetrafluoroethylene (PTFE), also known as Teflon.

📌 Key features:

Excellent chemical resistance
Highly corrosion resistant
Low friction coefficient
Limited pressure and temperature resistance compared to SWG

👉 Commonly used in chemical and corrosive environments

📊 Comparison: Spiral Wound Gasket vs PTFE Gasket

Criteria	Spiral Wound Gasket	PTFE Gasket
Structure	Metal + filler	Solid PTFE
Pressure resistance	Very high	Medium
Temperature resistance	Very high	Medium
Chemical resistance	Good	Excellent
Elasticity	High	Medium
Cost	Higher	Lower to medium

🏭 When should you use a spiral wound gasket?

Choose a spiral wound gasket when:

✔️ High-pressure systems

Oil & gas
Steam systems

✔️ High-temperature conditions

Power plants
Boilers

✔️ Critical sealing applications

RF and RTJ flanges

🏭 When should you use a PTFE gasket?

Choose a PTFE gasket when:

✔️ Highly corrosive environments

Acids and alkalis
Chemical processing systems

✔️ Low to medium pressure systems

✔️ Strong chemical resistance is required

⚠️ Common mistakes

Using PTFE in high-pressure systems → deformation and leakage
Using spiral wound gaskets without considering chemical compatibility → reduced lifespan
Ignoring real operating temperature conditions

🔥 Quick selection tips

👉 High pressure & high temperature → choose Spiral Wound Gasket
👉 Strong chemical resistance → choose PTFE Gasket

🏁 Conclusion

Spiral Wound Gaskets and PTFE Gaskets serve different purposes:

SWG = high pressure & high temperature performance
PTFE = excellent chemical resistance

👉 Choosing the correct gasket helps:

Improve sealing performance
Reduce leakage risk
Extend equipment lifespan

📞 Contact Information

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

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

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