Rubber Compensators / Bellows

By: Truco  11-11-2011
Keywords: Truco, Rubber Bellows

Rubber Compensators / Bellows Supplied by Truco, South Africa                                               Truco - leading manufacturer and supplier of Rubber Bellows in South Africa.

Rubber Bellows ( and) manufactured by Truco, are specifically engineered to provide flexibility to pipework installations. Rubber bellows are supplied ex stock from 40nb to 600nb. By using the best quality rubber compounds and design based on many years of experience, Truco’s rubber bellows are produced to a high quality standard to guarantee maximum safety and performance.

Rubber bellows provide:

  • Stress alleviation on pipeline equipment or piping caused by thermal expansion, vibration or misalignment
  • Compensation for axial, lateral and angular movements in pipework systems
  • Reduction of pressure pulses in pipework systems
  • Flexible joint faces which provide built-in sealing within the bellow construction

Truco distributes bellows nationally with offices in Johannesburg, Gauteng, Cape Town and Durban.

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Rubber Bellows manufactured by Truco are available in 5 different compounds:

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    • Fitted to bellow assemblies in order to control the expansion and contraction of the unit by Limiting the travel of the flanges up and down the rod by means of adjustable nuts and lock-nuts.
    • Threaded and fitted with two triangular gusset plates that are drilled to match the PCD of the bellow flanges. The third hole in the plate is where the control rod with adjustable nuts is located.
    • Recommended for use where bellow expansion is caused by pressure, there is   insufficient or no pipe supports and pipe anchors, there is excessive thermal expansion.

    Ex-stock flanges are zinc-plated, mild steel and drilled to bs4504 or bs10. Other flanges, such as ASA, are available on request.

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    Bellows Specifications:

    NEOPRENE  BLUE Excellent aging resistance, resistant to alkaline and acid salt solutions, and aldehydes.
    EPDM RED Good for high temperature and ozone resistance Not suitable for oil.
    BUTYL BLACK Good all round chemical resistance, ozone/weather resistant, low permeability.
    NITRILE YELLOW Recommended for oils, grease and petroleum products.
    HYPALON GREEN Suitable for strong acids and alkalis.

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Keywords: Rubber Bellows, Truco

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