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New mechanical and hydraulic multi-jackbolt tensioners

28 September 2017
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Text: Alastair Macduff

First published in Bolted #2 2017.

SUPERBOLT has its origins in the US steel industry and has been providing a wide range of bolting innovations for a variety of industries since the 1970s. Its ongoing success within Nord-Lock Group’s portfolio is based on a knowledge of customer challenges and a commitment to supplying practical solutions to the market.

Launched in December 2016, HyFit and ­VersaTite tensioners continue Superbolt’s tradition of versatility. Superbolt multi-jackbolt tensioners have been on the market since 1984, allowing bolted joints to be tightened mechanically, without specialized skills or heavy tooling. HyFit is hydraulically actuated, while VersaTite uses both mechanical and hydraulic tightening. Easy to fit and remove, they are offering safe and efficient operations and increased uptime to customers worldwide.

“To have both mechanical and hydraulic options is a huge advantage in many industries,” says Steve Brown, Global Product Manager, Expansion Bolts. “HyFit is ideally suited for use on high-speed couplings on gas and steam turbines, and on marine propulsion drives. Traditionally fitted bolts must have a close tolerance. The fitting and removal of these are often problematic and can lead to damage of the couplings and costly downtime for customers.”

Both HyFit and EzFit (previously named EB, mechanical Expansion Bolt), are designed to offer a simple easy-to-fit solution that, once tightened, will provide a long and reliable life­span.

VersaTite, as the name suggests, is a versatile tensioner that allows customers the flexibility of both hydraulic and mechanical tensioning and removal. Combining the speed of hydraulic tensioners and the accuracy of the Superbolt mechanical variant, it has been developed to improve operations in several industries since its launch at the Power-Gen International show in December 2016. “This type of ‘all-in-one’ technology represents the next step for Nord-Lock Group in terms of providing the market with a new generation of bolting solutions,” Brown says.

HyFit hydraulic expansion sleeve coupling bolts

EzFit hydraulic expansion sleeve coupling bolts

 

How to install EzFit expansion sleeve coupling bolt

New Brunswick Power Belledune Generating Station has been using Superbolt products since the mid 2000’s in their steam turbine for valves bolting.

In this video we show how EzFit expansion sleeve coupling bolt was able to solve a problem when standard fitted coupling bolts were causing severe damage on the turbine couplings.

Find out more:

EzFit mechanical expansion bolt

Video: Installation of mechanical expansion bolt at hydroelectric power plant

HyFit™ and EzFit™ expansion sleeve coupling bolts

HyFit and EzFit expansion sleeve coupling bolts by Superbolt

Bolted coupling challenges resolved!

Superbolt range of expansion sleeve coupling bolts offers a wide range of flexibility in application – suitable for through hole couplings, blind hole couplings – even applications requiring accurate location of components without axial load. The expansion bolts can be retrofitted to replace traditional interference and other types of coupling bolts most reliably and cost effectively.

Maximize availability

  • No coupling slippage or stuck bolts
  • No hole damage or re-machining
  • Fast and easy to install and remove
  • Concentricity established and held

 

Benefits

  • Maximize plant availability
  • Effective planning
  • Time saving solution
  • Improved overall coupling performance
  • Improved site safety
  • Reliability

 

The mechanical expansion bolt, now known as EzFit, is a long-established product with design capability for all types of couplings requiring truly fitted bolts, commonly used for Hydro turbines, Marine propulsion drive coupling, large motors and gear rings that require component location accuracy.

HyFit hydraulic expansion bolt is a newly advanced product that can replace all designs of coupling bolts. Main applications are found in power generation including conventional steam, high efficiency gas, hydro and wind turbines. With HyFit installed, customers benefit from both operation improvements in coupling performance along with saving time during plant maintenance periods. The innovative design features significantly reduce the risk of causing damage to the bolt or bolt hole, and address safety issues commonly experienced with alternative coupling bolt solutions.

The extensive product range of HyFit and EzFit expansion bolts provides the best options to fit your application. Furthermore, the unique features and advantages of both hydraulic and mechanical expansion sleeve coupling bolts can be combined to suit specific requirements.

 

More: HyFit hydraulic expansion sleeve coupling bolts

More: EzFit mechanical expansion sleeve coupling bolts

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