How to Prevent Gas Leakage of Jacketed Glass Reactor

The glass reactor is a multifunctional piece of laboratory equipment widely used in chemical, pharmaceutical, and research industries. There are primarily two types: double-layer jacketed glass reactors and single-layer glass reactors. These systems are known for their transparency for easy observation, chemical resistance, and excellent thermal load capacity.

However, during operation, users may experience a drop in vacuum level or gas leakage, especially if the reactor is not properly assembled or sealed. This is a common issue, but it can be easily resolved with correct installation techniques and routine maintenance.

Common Causes & Solutions for Gas Leakage

1. Use Vacuum Grease on All Glass Joints

When assembling a double-layer glass reactor, it’s crucial to apply vacuum grease to all glass connections. This includes:

• Valves

• Kettle covers

• Condenser ports

This step minimizes air infiltration and ensures a secure vacuum seal.

2. Check the Ceramic Bearing in the Agitator

The ceramic bearing (static ring) inside the stirring shaft must be:

• Properly tightened

• Lubricated with vacuum grease on the inner wall

This prevents leakage along the rotating shaft during stirring.

3. Tighten the Mechanical Seal

The mechanical seal plays a vital role in maintaining vacuum inside the reactor. Ensure the seal is:

• Fully and evenly tightened

• Free from cracks or damage
  A compromised seal is one of the most common sources of leakage.

4. Inspect Fasteners Regularly

All fasteners and flanges should be checked:

• Daily, especially before operation

• Tightened either by hand or with a wrench

  Note: When using a wrench to tighten valve bolts, do not apply excessive force, which could crack the glass or damage the seal.

Applications of Double-Layer Glass Reactors

A double-layer jacketed glass reactor supports a wide variety of chemical reactions, including:

• High-temperature and low-temperature reactions

• Vacuum reactions

• Constant-temperature solvent synthesis

• Distillation and reflux reactions

• Separation and extraction

• Purification and concentration

• Stirring and crystallization

Its vacuum-tight integrity is essential for all these applications to proceed efficiently and safely.

Conclusion

Preventing gas leakage in jacketed glass reactors is not complicated if users follow correct installation and maintenance practices. By applying vacuum grease, checking seals, and regularly inspecting joints, you can ensure your glass reactor operates under stable vacuum conditions.

Proper care not only extends equipment lifespan but also guarantees safe and efficient chemical processing.