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Engineered to meet the demanding torque applications for wind turbines, Enerpac has introduced a torque wrench pump, which the company claims can deliver up to 50% faster bolting than traditional torque wrench pumps of equal size.

According to Enerpac, the TQ700 improves the flow rate across the entire bolting cycle. With more oil flowing at the right time and proper volume, Enerpac says the technology consists of three separate oil flow stages, each maximized for a distinct portion of the bolt-tightening-process.

The first-stage flow allows more oil to be used when free-turning the nut onto a stud, instead of depositing it to the tank. Stage two begins when a stud starts to elongate and the rotation of the nut decreases, permitting the TQ700 to get the same amount of work out of less flow while reducing the heat generated. This cooler operation results in longer pump life. As the rotation of the elongated bolt slows even more, the TQ700 enters the third-stage flow until the nut tightens and the proper torque level is achieved. Less oil and heat are wasted throughout the bolting process, and the job is completed faster.

The structural components of the pump incorporate lightweight and durable aluminum with a compact footprint that easily fits through wind turbine door hatches or other small spaces, according to Enerpac.

Hybrid Energy Innovations 2015

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