Tentec Releases Hydraulic Bolt Tensioning Tools

Tentec has brought out the Aero Model WTF range of hydraulic bolt tensioning tools for wind turbines, with 25mm piston/ram capability for one-pull uninterrupted tensioning. These tools can be supplied to suit different thread forms, such as Williams and Dyson threaded bars and ISO metric and Imperial Unified Thread forms. As the amount of thread protruding can vary between turbines, the tensioning tool has been designed to work in two different ways.

When there is long stud protrusion from the foundation hexagon nut, a spare nut can be used on top of the Aero WTF tensioner, whereas with a short stud protrusion, an extended length puller can be used. This reaches down inside the tensioner to grip on to the short stud protrusion.

Other features include the gear nut run-down mechanism, which offers a rapid and consistent method to seat the foundation hexagon nuts during the tensioning procedure. All WTF tensioners are fitted with a spring mechanism that automatically resets the tensioner once the pressure has been released to zero. The Model WTF is then automatically ready to tension the next bolt. This speeds up turbine construction. No operator intervention is required.

All Aero WTF tensioners have been designed for use with Structural Hexagon Nuts to DIN 6915 and more conventional nuts to DIN 934. WTF is also designed for nuts that use washers to DIN 6916 and DIN 125. For added versatility, multiple Aero WTF tensioners can be linked together with high pressure flexible link hoses to give simultaneous bolt loading. All suitable hoses and connections are available from Tentec.

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