Chemical and cooling lubricant compatibility of seals in mechanical engineering

Introduction to the compatibility of seals

In mechanical engineering, seals play a decisive role in ensuring the functionality and longevity of systems. Compatibility with chemicals and cooling lubricants is of central importance here, as these media frequently occur in the operating environment.

Media lists and material selection

Careful selection of materials based on media lists is essential. These lists provide insights into the chemical resistance of sealing materials to specific chemicals and liquids. Materials such as PTFE, FKM or EPDM are particularly suitable depending on the application and chemical environment. Comprehensive chemical resistance is essential here.

Test methods for resistance

Seals must be rigorously tested to ensure their resistance to chemicals and cooling lubricants. Test methods include exposure to the respective chemicals under controlled conditions and long-term testing to assess ageing resistance.

Damage patterns and how to avoid them

Typical damage patterns in seals include swelling, hardening, cracking and chemical decomposition. To avoid these, it is important to make the correct material selection and to inspect and maintain the seals regularly.

Best practices for the design of seals

When designing seals, attention should be paid to the specific requirements of the application. This includes taking into account the temperature, the pressure and the media with which the seals come into contact. A detailed media compatibility matrix can help to make the right decisions.

Practical tips

• Regular inspection and maintenance of seals
• Use of protective coatings to extend service life
• Use of standardised test methods to ensure the quality of the seals
• Collaboration with experienced suppliers of sealing materials to find the best solution for specific applications

Through the correct selection and care of seals, industrial processes can be made more efficient and safer.

Frequently asked questions

How do I test the chemical resistance of seals?

Seals should be tested under realistic operating conditions with the specific chemicals and observed over longer periods.

Which materials are particularly resistant to chemicals?

PTFE, FKM and EPDM are materials that exhibit high resistance to chemicals.

What damage can occur with improper material selection?

Improper material selection can lead to swelling, cracking and chemical decomposition of the seals.

How do I extend the service life of seals?

Regular maintenance and the use of protective coatings can extend the service life of seals.

What role does temperature play in the selection of seals?

Temperature significantly influences the material properties and must be taken into account when selecting the right seal.