Metal Expansion Joint
 
 
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Selection of Bellows
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Smaller and larger sizes available, many additional in-house tools.

Standard materials are phosphor bronze, 321, 316, alloy 625 and many other materials in stock.

STANDARD BELLOWS SELECTION
Inch System (pdf) 
Metric System (pdf)

In our research facilities tests are continuously performed to obtain life expectancy data under various operating conditions. To establish the performance and life expectancy for bellows, all conditions must be known. To avoid design errors it is important to consider all special operating conditions that might affect the bellows performance.

The following information (minimum) should be considered to develop an optimal bellows design and engineered proposal.

  • Smallest internal diameter
  • Largest external diameter
  • Material specification
  • Internal/External pressure requirements
  • Working temperature
  • Movements (axial, lateral, angular)
  • Life cycles
  • Spring rate if known
  • Media conveyed
  • Overall length
  • End configurations(see drawings following)
  • Specified quantity
  • Test requirements if known

Longitudinal cross-section of a triple walled BOA Instrument Bellows, three times enlarged.

 

Fusion of a three-ply bellows with a component part by means of plasma welding. magnified 60 times.

 

Neck Execution
SAG-SAG
HB-HB
AB-AB
IB-IB

AL= Active Length

 

   




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