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Why do high-end rotary joints still leak in high-temp hot foil processes? Here is how we solved it.


Published Sep 23, 2026 896 min read

In their hot foil process, they have been using Deublin rotary joints running on Petro Canada FG heat transfer oil at temperatures up to 210°C - 220°C. However, Sean pointed out a common frustration: even after trying expensive high-end options like Stu Firg Kalrez, they are still facing sealing failures and annoying leaks. This means high maintenance costs and unwanted downtime.

This is a classic industry headache: high brand markup, yet short service life under harsh thermal conditions.

How did we help?

For severe thermal oil applications like this—supporting up to 350°C and 2.0 MPa—we introduced our Ruitus rotary joint solution:

  • Perfect Compatibility: 3/4” right-hand thread designed to seamlessly replace standard configurations.
  • Reliable Sealing: Engineered for high-temperature thermal oil to minimize leakage and extend service life.
  • Cost-Effective Tiers: Offering premium performance at a fraction of the cost, with competitive pricing tiers and ready stock.

If your plant is also struggling with frequent oil leaks, high replacement costs, or long lead times, let’s talk. Ruitus provides reliable alternatives and fast delivery!

#rotaryjoint #Rotary Union #Thermal Oil Rotary Union #High-Temperature Rotary Joint #Deublin Alternative #Mechanical Seal

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