Hydraulic Expansion Bolts

Superbolt was the world’s first to revolutionize nuts and bolts with multi-jackbolt tensioning technology. Since then, our technology has been proven in tens of thousands of successful installations and we continue to develop a multitude of solutions to solve the next generation of bolting challenges.

NEW SUPERBOLT HYFIT

Next generation hydraulic actuated coupling bolt

Superbolt is adding the New HyFit to its range of expansion bolt products. The launch further strengthens Nord-Lock Group ability to supply a complete range of tensioning solutions for any coupling bolt challenges.

The New Superbolt HyFit system has been conceived to eliminate the need for an internally connected thread puller. It uses a threaded connection of larger diameter than the bolt, making it far safer to use than any existing hydraulic coupling bolt design.

Traditional, ‘fitted’ bolts reduce in diameter when tightened, leaving clearance and the possibility of coupling slippage under shock loading. This can lead to difficulty in removal, resulting in coupling hole and bolt damage and causing outage delays and expensive repair work.

Hole and bolt damage can lead to days of unplanned work, meaning loss of availability and additional high-cost critical downtime.

Superbolt HyFit expansion bolts prevent all of these issues because they are installed and removed in clearance conditions.

SPECIFICATION

The New Superbolt HyFit is not a standard range of products but a system that can be designed for any requirement the system incorporates a Boltight hydraulic bolt tensioner and hydraulic nut.

Unlike traditional hydraulically actuated coupling bolts, Superbolt HyFit:

  • Uses two separate dimensionally different heads and just one operating pressure, eliminating the risk of using the wrong pressure during operation.
  • Uses heads that have a unique design so there is no way to use them incorrectly during the procedure.
  • Has a new HyFit nut which is used to tension the bolt, so it can be retrofitted to any existing coupling bolt and used with the HyFit system.

Superbolt HyFit is ideal for steam turbines, gas turbines, marine propulsion drives, and all heavy rotating equipment providing benefits which include;

  • SECURE - Elimination of internally connected thread puller.
  • EFFICIENT - Design that removes the need for oil injection removal methods, preventing a known mode of failure.
  • COST SAVING - Hole preparation costs are reduced as less demanding hole tolerances are required.
  • SAFE - Use of two-dimensionally different hydraulic heads with one operating pressure.
  • ACCURATE - Radial fit which allows for better coupling alignment and concentricity.
  • COST-EFFICIENT - Fully reusable, only requires sleeve replacement for rotor changes.
  • PRACTICAL - Superbolt HyFit split sleeves allow greater expansion to achieve hole tolerances more easily.

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