Follow us on Call us for support at 952-935-2345. After hours messages are monitored 24/7.


Advantages and Disadvantages of Bellows and Packed Slip Type Expansion Joints

The following is a comparison of the advantages and disadvantages of both bellows and
packed slip type expansion joints.

Bellows Type Expansion Joints 

 Advantages  Disadvantages

• Bellow joints do not require access; i.e. They can be direct buried, however a telltale is recommended
• No maintenance is required.

• Bellows joints can fail catastrophically.
• No in place maintenance or repair can be performed – they must be replaced if damaged.
• Require that the system be shut down when a failure occurs.
• Chance of personal and/or property damage when failure occurs.
• Installer can easily misuse joints when correcting for pipe misalignment.



Packed Slip Type Expansion Joints

 Advantages  Disadvantages

• No catastrophic failure mode.
• Fabricated from materials similar to the pipe line.
• Rugged construction – the wall thickness of every part of the expansion joint is at least as heavy as that of the system in which they are installed.
• In the event that a leak occurs there is no need to shut the system down for repairs.
• Allow for safe packing injection under full line pressure.


• Must be located to allow access for inspection and maintenance.
• May require occasional addition of injectable packing.

 Contact Campbell-Sevey to learn more about how we can assist you with your expansion joint needs.

<< Go Back
Subscribe to our CS Update Newsletter: Send Me The Latest News

952-935-2345  address15350 Minnetonka Blvd., Minnetonka, MN 55345

Products We Carry

  • Hot Water Boilers
  • Watertube Steam Boilers
  • Firetube Steam Boilers
  • Deaerators
  • Heat Recovery Steam Generators (HRSG’s)
  • Automatic Recirculation Valves
  • Economizers
  • Gas-Fired Water Heaters
  • Gas-Fired Humidifiers
  • Boiler/Generator Flue Stacks
  • Continuous Emissions Monitors (CEMS)
  • Pressure Reducing Valves
  • Safety and Relief Valves
  • Control Valves
  • Pressure Independent Control Valves
  • Expansion Joints, Guides, Anchors
  • Flash Tanks
  • Flow Meters
  • Balancing Valves
  • Check Valves
  • Separators
  • Pumps
  • Pressure Booster Systems
  • Piston Valves
  • Heating/Cooling Coils
  • Plate and Frame Heat Exchangers
  • Shell and Tube Exchangers
  • Water Heaters
  • Steam Humidifiers
  • Vacuum Systems
  • Condensers
  • Steam Traps
  • Wireless Steam Trap Monitors
  • Tube Bundles
  • Direct Gas-Fired Space Heaters
  • Direct Gas-Fired Make-Up Air Units
  • Unit Heaters
  • Strainers
  • Air Vents
  • Liquid Drainers
  • Heat Transfer Packages
  • Digital Water Mixing Valves
  • Air Cooled Condensers/Dry Coolers
  • Steam Filters
  • Electric Condensate Pumps
  • Steam/Air-Powered Condensate Pumps
  • Packaged Condensate Pump Skids