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:

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

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


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

Truco union type bellows are engineered and manufactured with EPDM, Neoprene, Butyl, Nitrile & Hypalon.

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.

Union type bellows

Send us your requirements using the STAMPED acronym:

Size: The length and inside diameter?

Temperature: Temperature of the medium transported?

Application: What is the purpose of the bellow?

Material: What product will be conveyed through the bellow?

Pressure: The working pressure and the required safety margin?

Ends: Are couplings required, and if so a detailed specification?

Delivery: When is it needed?


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