Cardan expansion joint (bellows expansion joint of cardan type) is a kind of angular expansion joint. It performs its functions under conditions of angular action of connected structures, bending along its axis within the elastic deformation of the bellows material.

Features of cardan expansion joint

For angular bellows expansion joint with a cardan joint, the hinge-type limiting fittings are made in the form of two pairs of forks welded to the supporting flanges, interconnected by four axes of rotation located in two mutually perpendicular planes through the cardan ring. The supporting flanges are welded to the connecting branch pieces.

This design allows to take up angular displacements in any direction and can be used in spatial systems with displacements in two planes. The cardan ring can be either round or square or octagon.

Kompensator SPE, JSC has experience in manufacture of the following types of cardan (angular two-plane) expansion joints:

  • cardan bellows expansion joints with welded neck branch pieces, type PPPN (ПППН);
  • cardan bellows expansion joints with flanges, type PPFN (ППФН);
  • cardan bellows expansion joints with flange and branch piece, type PPDN (ППДН).

These bellows expansion joints can be installed directly in pipelines carrying water (delivery and drinking water) under a temperature of up to 150 °С and at a flow rate of up to 8 m/s, oil and oil products under a temperature of up to 450 °С and at a flow rate of up to 8 m/s, as well as steam and gaseous media that do not corrode materials of the expansion joint under a temperature of up to 500 °C and at a flow rate of up to 20 m/s.

Cardan expansion joints can be installed directly in pipelines, carrying under a temperature of up to 150 °С and at a flow rate exceeding 8 m/s, as well as steam and gaseous media that do not corrode materials of the expansion joint under a temperature of up to 500 °C and at a flow rate from 20 to 80 m/s provided a branch piece is installed

Поворотные двухплоскостные (карданные) сильфонные компенсаторы

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Сardan bellows expansion joints with welded neck branch pieces, type PPPN (ПППН)
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Сardan bellows expansion joints with flanges, type PPFN (ППФН)
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Сardan bellows expansion joints with flange and branch piece, type PPDN (ППДН)
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