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Union-Type Bellows

Union-type, or twin-sphere, bellows from Truco connect misaligned pipelines. Designed with a unique twin-sphere construction, this bellow facilitates greater flexibility in pipelines than regular, single-sphere bellows.

Compression moulded and joined by union heads and screw-in threads, Truco’s union-type bellows absorb the elongation and contraction of steel pipes caused by variations in temperature and prevents the piping system from cracking.

Additionally, our union-type bellows reduce vibration and noise for all types of steel pipes.

Features and benefits:

  • Ideal for misaligned steel pipelines
  • Can be used for repairs in existing pipelines
  • Standard sizes available ex-stock
  • Custom sizes available on request
  • Easy installation on all steel pipes
  • Eliminate vibration and noise from pipework
  • Delivery within 1 – 2 days from order


Truco warranties its entire range of Union-Type rubber bellows against inferior quality of material and bad workmanship.

Reduce risk to your pipelines
with quality bellows from Truco
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Union-type bellows can be used in existing applications!

Owing to their extreme flexibility, Truco’s union-type bellows can be used to repair existing pipework in any steel pipeline. In addition, these bellows can be used to connect misaligned steel pipework.

Truco’s union-type bellows are available in the following nominal bore (NB) sizes:

25 mm          50 mm
32 mm          65 mm
40 mm          80 mm


Industrial plants can instantly reduce the risk of damage to steel pipelines by
installing union-type bellows from Truco.

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Truco can customise a union-type bellow size larger
than 80 mm for unique applications. Enquire today!


Union-type bellows are made from:

  • EPDM (available ex-stock)/li>
  • Neoprene
  • Butyl
  • Nitrile
  • HHypalon

With an extensive stock holding, Truco’s customers benefit from
immediate availability across South Africa, including Johannesburg,
Cape Town and Durban, as well as across Africa.

Reduce risk to your pipelines
with quality bellows from Truco
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  Enjoy the convenience of immediate stock availability and
reduce risk to your pipeline systems! Enquire today or
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