Top 7 Rotary Union Leakage Problems & How to Fix Them?

⚠️ 1. Worn-Out Seals

Problem:

Seals inside the rotary union wear out over time due to friction and continuous operation.

Signs:

• Fluid leakage near seal area

• Reduced pressure

• Frequent maintenance

Solution:

• Replace seals periodically

• Use high-quality seal materials suitable for your application

• Choose the right rotary union for temperature and pressure

⚠️ 2. Improper Installation

Problem:

Incorrect alignment during installation causes uneven load on seals, leading to leakage.

Signs:

• Leakage soon after installation

• Vibration or noise

Solution:

• Ensure proper alignment between shaft and rotary union

• Follow manufacturer installation guidelines

• Use flexible hoses to reduce stress

⚠️ 3. Excessive Pressure or Temperature

Problem:

Operating beyond the rated pressure or temperature damages internal components.

Signs:

• Sudden leakage

• Seal deformation

• Reduced lifespan

Solution:

• Always operate within specified limits

• Select rotary unions designed for high pressure or high temperature applications

⚠️ 4. Poor Fluid Quality

Problem:

Contaminated or dirty fluid causes abrasion inside the rotary union.

Signs:

• Seal damage

• Internal wear

• Reduced efficiency

Solution:

• Use filtered and clean fluids

• Install proper filtration systems

• Regularly inspect fluid quality

⚠️ 5. Shaft Misalignment

Problem:

Misaligned shafts create uneven rotation and stress on the rotary union.

Signs:

• Continuous leakage

• Vibration

• Premature failure

Solution:

• Check shaft alignment during installation

• Use precision alignment tools

• Conduct regular maintenance checks

⚠️ 6. Bearing Failure

Problem:

Worn or damaged bearings affect smooth rotation, leading to leakage.

Signs:

• Noise during operation

• Overheating

• Irregular rotation

Solution:

• Replace bearings when required

• Use high-quality bearings

• Ensure proper lubrication

⚠️ 7. Incorrect Rotary Union Selection

Problem:

Using the wrong type of rotary union for your application leads to frequent leakage.

Signs:

• Repeated failures

• Inconsistent performance

Solution:

Select rotary union based on:

1. Fluid type (steam, oil, water, air)

2. Pressure

3. Temperature

4. Speed (RPM)

Consult an expert supplier before selection

✅ Preventive Maintenance Tips

To avoid leakage issues:

• Perform regular inspection

• Replace worn-out parts on time

• Use correct installation practices

• Maintain proper operating conditions

• Choose Atlas Engineering Company as your rotary union suppliers

📞 Conclusion

Rotary union leakage is a common but preventable issue. By identifying the root cause and applying the right solutions, you can significantly increase the life of your equipment and reduce downtime.

If you are facing frequent leakage problems, it may be time to upgrade or select the right rotary union for your application.

📞 Atlas Experience

In our experience supplying rotary unions to industries across Mumbai, Thane, and Navi Mumbai, leakage issues are most commonly observed in water applications unions due to improper installtion which includes using heavy duty hydraulic hoses which are not meant for water application. This causes weight burden on the rotary unions making it loose its alignment and causing minor leakage. If treated at the right time rotary union can be saved by replacing the seals.  

Facing rotary union leakage in your machine?

Share your application details (media, pressure, RPM), and our team will recommend the right rotary union to eliminate leakage and improve performance. 

👉 Contact us today to discuss your requirement and get the right solution for your industry.

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