Home > GT Series bolt tensioners now available from Enerpac

GT Series bolt tensioners now available from Enerpac

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Enerpac has announced a new range of bolt tensioners, the GT Series, which have been designed to enable faster, safer and more precise maintenance and fabrication operations.

Available in capacities up to 2845kN (320 ton) at 1500 bar, these bolt tensioners are particularly useful where operators want to achieve known and accurate bolt loads across multiple applications, such as pipelines and flanges.

The GT Series features:

  • six load cells with kits from M16 to M95 or from 5/8 in to 3 ¾ in
  • twin ports for quick connection of multiple tools
  • one size of bridge per size of load cell
  • a detachable and rotational bridge for simpler tool positioning
  • full bridge window
  • piston stroke indicator
  • black surface treatment to protect against corrosion; and
  • anti-slip grip for more secure handling.
So as to tension with exactly the degree of force needed for an application, GT Series bolt tensioners are expanded by hydraulic force to stretch the bolts to which they are attached. Nuts can then be locked in place to hold the tension.

This precise and time saving fastening technology makes the GT Series well suited for use in applications involving critical tolerances and multiple bolting tasks on:

  • heavy industrial
  • mining
  • quarrying
  • primary processing
  • power generation and resource exploration; and
  • development equipment and infrastructure.
In addition, the time saving nature of working with GT Series tensioners makes them particularly useful where exposure time to nearby hazards needs to be minimised.

Enerpac National Bolting Manager Pat Molloy notes that another major benefit of GT Series bolt tensioners is the ability to fasten multiple bolts at one time, using exactly the same pressure from the same power source.

This ability to daisy chain hydraulic tensioners, he explains, gives even pressures across a bolted surface, which is a major advantage, especially where high technology, high pressure equipment is involved.

“Tensioners are often the best way of guaranteeing leak-free start up of plant,” Mr Molloy says. “On larger bolting applications, tensioners not only increase the accuracy of clamping forces, but also simultaneously cut by 50 per cent the time required for the job, compared with other controlled bolting methods.”

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