Rubber compensators: the bellow is made of rubber reinforced with synthetic cord (the kind of rubber depends on operating conditions of a compensator), working temperature usually ranges up to +90°C (optionally up to +130°C).
Steel compensators: the bellow is made of acid proof steel 321, steel compensators are resistant to high temperature, corrosion and aggressive chemicals, they have good mechanical characteristics and high fatigue strength.
PTFE compensators: the bellow is made of annularly corrugated, thick-walled PTFE tube, they make a group of flexible joints with the highest chemical resistance.
Fabric compensators are used for flexible pipe connection in applications in which rubber compensators cannot be used for various reasons - especially in case of very high temperature, ranging up to 1000°C.