STENFLEX® PTFE expansion joints are manufactured from high-quality materials and are specifically adapted to current market requirements through ongoing further development operations and the development of new components. The outstanding property of these expansion joints is their resistance to aggressive chemicals and solvents – a characteristic that has been proven in practical applications over a number of years.
PTFE bellows are available in two types of material:
Bellows made from white PTFE
Bellows made from black PTFE
White PTFE bellows do not have any electrical conductivity properties and can therefore be used as an insulation component. Black PTFE bellows are electrically conductive due to the addition of soot.
Bellows with connection parts (rotable flanges)
The absorption of axial, lateral, angular and simultaneous movement is possible. Universal expansion joints with two bellows and a connecting pipe are used to absorb large movement.
Robust pipe fixed points and correct pipe-routing are essential when axial force must be absorbed.
Bellows with flanges and laterally moving restraints
Lateral shift of the expansion joint is possible. The restraint absorbs axial reaction force and relieves pressure on the pipe’s fixed points. Lateral expansion joints with two bellows and a connecting pipe are used to absorb large movement.
Only light fixed points are needed to absorb lateral moving and friction force.