Top 10 Non Metallic Gasket Types and Their Applications in Industry

Gaskets play a crucial role in industrial systems, preventing liquid or gas leakage and ensuring equipment safety and efficiency. Compared with metallic gaskets, non-metallic gaskets are widely used across industries thanks to their flexibility, chemical resistance, and cost advantages. This article introduces the Top 10 common non metallic gasket types and analyzes their applications in different industrial sectors.

1. Rubber Gaskets

Rubber gasket is made from natural or synthetic rubber such as NBR and CR. They are widely used in low-pressure, low-temperature sealing applications. These gaskets are common in medical devices, pharmaceutical packaging, and epidemic prevention equipment.

Key Features:

• Excellent flexibility and resilience

• Suitable for potable water and general liquid sealing

• Low cost and easy to process

2. PTFE Gaskets

PTFE (Polytetrafluoroethylene) gaskets are renowned for their outstanding chemical resistance and high-temperature tolerance. They are widely used in the pharmaceutical, food, and chemical pipeline industries.

Key Features:

• Resistant to acids and alkalis, corrosion-proof

• Anti-aging, ideal for high-cleanliness environments

• Suitable for piping systems transporting medical liquids and disinfectants

3. Non-Asbestos Gaskets

Due to health risks, traditional asbestos gaskets have been phased out, replaced by non-asbestos fiber composites. These non asbestos gaskets are usually made of aramid fibers, glass fibers, and rubber.

Key Features:

• Excellent thermal stability

• Environmentally safe, meeting public health standards

• Widely used in medical equipment and steam systems

4. Cork Rubber Gaskets

Cork rubber combines cork particles with rubber, offering good compressibility and vibration absorption.

Key Features:

• Good oil resistance

• Suitable for light machinery and pharmaceutical packaging machinery

• Dual function of vibration absorption and sealing

5. Paper Gaskets

Paper gaskets are often used in low-pressure environments, such as sealing inside medical testing devices. Although less durable, their low cost makes them common in disposable devices and packaging.

Key Features:

• Low cost

• Easy to shape

• Suitable for temporary, low-pressure, non-high-temperature sealing

6. Graphite Gaskets

Graphite gaskets are highly resistant to high temperatures and corrosion, commonly used in pharmaceutical steam equipment and chemical reactors.

Key Features:

• Can withstand temperatures above 450°C

• Excellent chemical stability

• Suitable for high-pressure systems

7. Fiber Gaskets

Fiber gasket is made by compressing plant or synthetic fibers with rubber. They are commonly used in pumps, compressors, and medical equipment pipelines.

Key Features:

• Good water resistance

• Suitable for medium and low-pressure environments

• Commonly seen in pharmaceutical packaging and laboratory equipment

8. Silicone Gaskets

Silicone gaskets offer biocompatibility and high cleanliness, making them particularly valuable in the medical device industry.

Key Features:

• Wide temperature range (-60°C to 200°C)

• Non-toxic, odorless, FDA compliant

• Common in infusion devices and pharmaceutical packaging

9. EVA Foam Gaskets

EVA (Ethylene-Vinyl Acetate) foam gaskets are lightweight and flexible, with good cushioning and insulation properties.

Key Features:

• Excellent shock absorption

• Used in medical packaging and transport cushioning

• Moderate cost, easy customization

10. Polyurethane Gaskets

Polyurethane gaskets combine wear resistance with flexibility, widely used in applications requiring friction resistance.

Key Features:

• Oil- and wear-resistant

• Applied in medical device housings and protective equipment

• Long service life, suitable for repeated assembly

Comparison of Non-Metallic Gasket Types and Typical Applications

Conclusion and Selection Advice

In industrial applications, selecting the right non-metallic gaskets type requires consideration of operating temperature, pressure, chemical media, and hygiene standards. For medical systems, epidemic prevention departments, and public health institutions, PTFE and silicone gaskets are more common because they combine high cleanliness with excellent chemical resistance, meeting strict industry standards.

About Teamful Sealing

As a professional sealing solutions provider, Teamful Sealing has long been dedicated to supplying reliable non-metallic gaskets and comprehensive sealing solutions for the medical, pharmaceutical, epidemic prevention, and public health sectors. We offer full-process support, from material R&D and production to customized services, helping clients achieve efficient and safe sealing.