Technical Guide: How to Choose the Right Gasket for Your Application

Selecting the right gasket is essential to ensure the safety, efficiency, and durability of any sealing system. At Kempchen Comdiflex, we understand that each application has specific requirements. Below, we offer a guide to help you make this selection, highlighting our available solutions.

1. Type of Fluid

The gasket material must be compatible with the fluid circulating in the system:

• Acids and aggressive chemicals: We recommend using PTFE gaskets or those with graphite coating due to their excellent chemical resistance. The metallic part of the gasket in contact with the fluid, if required, should be made of Monel.

• Hydrocarbons and oils: Gaskets made of synthetic fibers combined with resistant elastomers offer optimal performance under these conditions.

• Water and steam: Rubber or compressed fiber gaskets are ideal for these applications, providing effective and durable sealing. Always consider temperature and saturation level.

2. Operating Temperature

Thermal resistance is crucial for gasket performance:

• Low temperatures (-100°C to 150°C): Materials such as rubber (up to 180°C) and PTFE (up to 250°C) are suitable for these conditions.

• Medium temperatures (150°C to 450°C): Flexible graphite and synthetic fibers are recommended within this thermal range.

• High temperatures (above 450°C): Metal gaskets, such as spiral wound gaskets or metal-jacketed gaskets, are most suitable due to their ability to withstand extreme temperatures.

3. System Pressure

Pressure directly influences gasket selection:

• Low pressure (<40 bar): Non-metallic gaskets, such as those made of rubber or fibers, are appropriate for these applications.

• Medium pressure (40 to 100 bar): Semi-metallic gaskets, such as corrugated gaskets, are recommended as they combine flexibility and strength.

• High pressure (>100 bar): Metallic gaskets, such as Kammprofile gaskets, provide safe and durable sealing under high pressures.

4. Sealing Surface Conditions

The nature of the sealing surfaces also affects the selection, with the gasket material always being softer than the flange:

• Rough or irregular surfaces: Gaskets with high conformability, such as expanded graphite or EPTFE, are required to better adapt to irregularities.

• Smooth and uniform surfaces: Stiffer gaskets, such as flat metallic gaskets, can be used under these conditions—or, depending on requirements, metallic gaskets coated with PTFE or graphite.

5. Standards and Certifications

It is essential to ensure that the gasket complies with the applicable standards and regulations in your industry, such as ASME, DIN, or API. At Kempchen Comdiflex, our gaskets are designed and manufactured in accordance with these standards, ensuring quality and safety in every application.

Conclusión

The right gasket selection not only prevents leaks and system failures, but also optimizes efficiency and reduces maintenance costs. At Kempchen Comdiflex, we offer a wide range of sealing solutions tailored to every industrial need. Our team of experts is available to advise you and help you select the most suitable gasket for your specific application.

For more information about our products and services, visit our website or contact us directly.