Mechanical seals and Pumps

Step-by-Step to Installing Labyrinth Seals

Have you ever wondered how to install labyrinth seals effectively? Installing these seals may seem complex, but with the right guidance, it can be a straightforward process.

In this blog post, we’ll walk you through a step-by-step approach to installing labyrinth seals. By following these clear instructions, you’ll be able to complete the installation with confidence and precision.

PEEK Labyrinth Seal Carbon Filled scaled 1

Step-by-Step to Installing Labyrinth Seals


Before installing labyrinth seals, gather the necessary tools and materials. This includes the labyrinth seals, a clean cloth, cleaning solution, and a seal installation tool if required. Consult the manufacturer’s instructions for any specific requirements.

Clean the Sealing Surfaces

Clean the surfaces where the labyrinth seals will be installed. Use a clean cloth and an appropriate cleaning solution. Make sure to remove any dirt, debris, or old sealing material. The surfaces should be clean and dry before proceeding.

Check the Seal Orientation

Labyrinth seals have a specific orientation. Check the manufacturer’s diagrams to determine the correct orientation. The seal should be installed with the open side facing the direction of the pressure gradient. Incorrect orientation can lead to seal failure.

Position the Seal

Carefully position the labyrinth seal into the housing. Make sure it is seated properly and not twisted or deformed. If the seal has a split design, make sure the ends are properly aligned. Use the seal installation tool if provided by the manufacturer.

Secure the Seal

Once the labyrinth seal is positioned correctly, secure it in place. Follow the manufacturer’s instructions for tightening bolts or using any locking mechanisms. Do not overtighten as this can damage the seal. Make sure the seal is snug and does not move.

Test the Seal

After installation, test the labyrinth seal to make sure it is functioning properly. Follow the manufacturer’s guidelines for testing procedures. Check for any leaks or abnormal sounds. Make adjustments if necessary.

Final Check

Do a final check to ensure the labyrinth seal is installed correctly. Clean up the work area and dispose of any debris properly. Make a record of the seal installation, including the date, seal specifications, and any notes about the process. Regular inspections should be scheduled to check seal performance.


How do I determine the correct size of the labyrinth seal

Measure the diameter of the shaft and the bore of the housing using a micrometer or caliper. Refer to the manufacturer’s specifications to select the appropriate seal size based on these measurements.

How do I check for proper installation and alignment

After installation, rotate the shaft manually to ensure it turns smoothly without binding. Check for any signs of misalignment, such as uneven gaps or contact between the seal and the rotating component.

What should I do if I notice leaks after installing the seal

If leaks are detected, check for proper installation and alignment. Ensure the seal is the correct size and that the surface is clean and undamaged. If the issue persists, consult the manufacturer or a professional for guidance.

Can I reuse a labyrinth seal after removing it

It is generally not recommended to reuse a labyrinth seal once it has been removed. The removal process can damage the seal, and the seal may have already experienced wear during its previous use. Always use a new seal for optimal performance and reliability.

Are labyrinth seals directional

Labyrinth seals are not directional. They can be used to seal in either direction. The seal is created by the tortuous path that the fluid must navigate through, regardless of which direction the fluid is moving.

What is the clearance for a labyrinth seal

The clearance for a labyrinth seal depends on the specific design and application. Typical clearances range from 0.005 to 0.030 inches (0.127 to 0.762 mm). Tighter clearances provide better sealing but may cause rubbing and wear.

Larger clearances reduce the risk of rubbing but may allow more leakage. The optimal clearance balances sealing performance and durability for the given operating conditions.

Which type of lubricant increases the effectiveness of a labyrinth seal

Lubricants are generally not used with labyrinth seals. These seals are non-contacting and rely on the tortuous path to prevent fluid flow. Adding lubricant can actually be detrimental, as it may clog the narrow passages.

In some cases, a small amount of grease may be used during assembly to prevent damage. However, this grease should be kept away from the labyrinth paths to maintain sealing performance.

In conclusion

Installing labyrinth seals is a straightforward process that can significantly improve the efficiency and performance of your machinery. By following these step-by-step instructions, you can ensure a proper installation.

For more information on labyrinth seals and their applications, visit our website or contact our expert team today.


Todd is the manager of Cowseal mechanical seal manufacturer. Cowseal located in China with over 20 years of experience in the mechanical seal and pump industry. They offer a wide range of high-quality mechanical seals and are committed to providing reliable and cost-effective solutions for their customers.

Send Your Inquiry Today