In piping systems, machine connections, or high-pressure equipment, gasket packing serves as the primary protection against leaks. Despite its small size, the role of a gasket is extremely significant—especially in maintaining production process stability and workplace safety. However, not all gaskets are created equal. Each type has its own advantages and specific applications.
Below are 7 types of gasket packing most commonly used across various industrial sectors, complete with their functions and advantages.
1. Spiral Wound Gasket
Characteristics:
A combination of metal (usually stainless steel) and non-metal materials such as graphite or PTFE, wound together in a spiral form.
Uses:
Ideal for applications involving high pressure and high temperatures, such as oil refineries, power plants, and petrochemical industries.
Advantages:
2. Ring Type Joint (RTJ) Gasket
Characteristics:
Made from solid metal and typically used with specially grooved flanges.
Uses:
Applied in high-pressure pipe connections, especially in offshore oil and gas industries.
Advantages:
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Withstands extremely high pressure
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Provides very tight mechanical sealing
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Suitable for systems operating under extreme pressure
3. Graphite Gasket
Characteristics:
Manufactured from expanded graphite or graphite foil. Known for its resistance to high temperatures and corrosive chemicals.
Uses:
Suitable for steam applications, hot gases, and aggressive chemical media.
Advantages:
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Highly resistant to high temperatures (>450°C)
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Flexible and easily conforms to surface irregularities
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Resistant to aggressive chemicals
4. PTFE (Teflon) Gasket
Characteristics:
Made from polytetrafluoroethylene (PTFE), commonly known by the brand name Teflon.
Uses:
Ideal for applications requiring high chemical resistance, such as in the food, pharmaceutical, and chemical industries.
Advantages:
5. Rubber Gasket
Characteristics:
Made from elastomer materials such as EPDM, NBR, or neoprene.
Uses:
Commonly used in water, air, or low-pressure fluid connections.
Advantages:
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Flexible and easy to install
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Resistant to water, oil, and some mild chemicals
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Relatively low production cost
6. Compressed Non-Asbestos Fiber (CNAF) Gasket
Characteristics:
A safer asbestos replacement material for the working environment, composed of synthetic fibers and elastomer binders.
Uses:
Used across various industries as an economical and safe sealing solution.
Advantages:
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Safe for health (asbestos-free)
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Withstands moderate pressure and temperature
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Suitable for oil, gas, water, and mild chemicals
7. Metal Jacketed Gasket
Characteristics:
A soft core (usually graphite) encased in metal such as stainless steel or aluminum.
Uses:
Used in heat exchangers, boilers, and applications with heavy mechanical loads.
Advantages:
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Resistant to high mechanical pressure
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Combines metal strength with soft material flexibility
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Suitable for repeated use (reusable)
How to Choose the Right Type of Gasket
Choosing a gasket should not be done carelessly. Several important factors must be considered:
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Operating pressure and temperature
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Type of fluid (chemical, water, gas, steam, oil)
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Flange condition and surface roughness level
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Industry regulations and certifications (e.g., FDA for food-grade applications)
Choosing the wrong gasket can lead to serious consequences: leaks, machine damage, and costly production downtime.
Conclusion
By understanding the characteristics and functions of each type of gasket packing, you can determine the most efficient and safe sealing solution for your industrial needs. Do not focus solely on price—consider performance, durability, and suitability to operational conditions.
If you are looking for a complete and reliable gasket packing supplier ready to provide technical solutions tailored to your industrial requirements, Andy Jaya Packing is here to help. Consult your needs with our team today!