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Special application of metal bellows

Metal bellows couplings

The metal bellows couplings compensate axial, lateral and angular displacements between shafts.

 

Bellows couplings characteristics:

  • Absolutely backlash free
  • Exact torque transfer
  • Compensation of shaft misalignments
  • High torsional stiffness and low moment of inertia
 
  • Metal bellows resistant to corrosion
  • Frictional, easy to fit shaft-hub connection
  • Precise production, long life time
  • Maintenance free

Metal bellows couplings

 

Metal bellows couplings

Metal sealing bellows in valves

Metal bellows sealed valves are a new kind of valves engineered and designed to prevent leakage to atmosphere and are used for hermetical sealing. They are made from stainless steel or nickel alloys. Bellows sealing are optimum choice in valves for toxic, inflammable, corrosive, radioactive and poisonous media. Furthermore for vacuum valves, hot oil valves, ammonia valves, steam valves, high pressure and high temperature valves. These valves guarantee „zero leakage“ and are also known as the best available valves which eliminate media loss and reduce the risks and monitoring costs.

Metal sealing bellows for thermostatic valves

 

Metal sealing bellows for valves

Metal sealing bellows for valves

Hermetically sealed stainless steel metal bellows for oil expansion. Helium leak tested at 1×10-7 mbar•l•s-1

 

The metal bellows for oil expansion DN300

Metal expansion bellows

 

Bellows-oil expansion device at instrument transformer

Expansion joints for heat exchangers

Depending on the type of heat exchangers, expansion joints are installed in the vessel shell or at the connection of the floating head.
Axial expansion joint installed in the shell of heat exchanger is used to absorb differential expansion between tubes and vessel shell (see left figure).
Axial expansion joint at the floating head of heat exchanger has relatively small diameter and can be designed for internal or external pressure (see right figure).

Axial expansion joint installed in the shell of heat exchanger

 
Axial expansion joint at the floating head

Axial expansion joint at the floating head