Rubber expansion joints

Rubber expansion joints are designed to compensate for axial, lateral or angular movements in piping systems or equipment. Rubber expansion joints with external tie rod tensioning are particularly suitable for reducing vibrations and damping noise in piping systems and plants where the installation of fixed points to absorb the pressure reaction forces is not or only insufficiently possible.

The rubber bellows are manufactured from a wide variety of elastomer qualities, which make them suitable for use in the transport of a wide variety of media.

The structure of the rubber body, consisting of various elastomer and fabric layers, reinforced in the flange area by vulcanized-in metal rings, guarantees high stability and resistance to pressure or vacuum.

They are particularly suitable

  • for absorbing axial and lateral expansion
  • compensate for mounting inaccuracies
  • compensate for mechanical vibrations
  • for noise damping Areas of application
  • air conditioning, heating and ventilation systems
  • Power plants
  • process piping for pulp and paper, chemical and petrochemical industries
  • Wastewater disposal and sewage treatment plants
  • Shipbuilding and offshore
  • Process piping for the metal producing industry and petroleum refineries
  • Food processing
  • Pollution monitoring systems
FunkFlex rubber expansion joint with 90° bend, butyl (EJR881)
FunkFlex rubber expansion joint with 90° bend, butyl (EJR881)
EJR894 / Typ Flamenco
EJR894 / Typ Flamenco
EJR890 / Typ Rock
EJR890 / Typ Rock
EJR899 / Typ Punk
EJR899 / Typ Punk
EJR900 / Typ Disco
EJR900 / Typ Disco
EJR893 / Typ Funk
EJR893 / Typ Funk
EJR890 / type Rockabilly
EJR890 / type Rockabilly

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Frequently asked questions about rubber expansion joints

Rubber expansion joints compensate axial, lateral or angular movements in piping systems and plants. They absorb axial and lateral expansion, compensate for installation inaccuracies, dampen mechanical vibrations and reduce noise.

Rubber expansion joints with external tie rods are particularly suitable where vibrations and noise must be reduced, but fixed points to absorb the pressure reaction forces cannot be installed or only insufficiently.

The rubber body consists of several elastomer and fabric layers. In the flange area it is reinforced with vulcanised metal rings. This ensures high stability and strength against pressure or vacuum.

The rubber bellows are made from various elastomer grades. This allows rubber expansion joints to be used for conveying a wide range of media.

Typical applications are air-conditioning, heating and ventilation systems, power plants, process lines in chemistry, petrochemistry and the pulp and paper industry, waste water disposal and treatment plants, shipbuilding and offshore as well as food processing.

Rubber expansion joints are particularly suitable for reducing vibration and noise. Stainless steel metal expansion joints are mainly used where thermal expansion occurs in pipelines. More on metal expansion joints.

Yes. FunkFlex combines two double-bellows rubber expansion joints with a 90° bend in one element and was developed specifically for vibration decoupling of heat pumps. More on heat pump decoupling (FunkFlex).

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