Hydraulic Bolt Tensioners

Advantages of Bolt tensioners:

• Most conventional tools and devices that are used to tighten screw connections when working with long bolts (studs) can cause them to twist and thus complicate the problems for which they were created. These are the offset flange leaks, damaged seals that cause unplanned downtime for troubleshooting.
• In all cases, when tightening screw connections requires maximum accuracy, reliability and dosed torque, the best option is to use a hydraulic bolt tensioner that solves all these problems.
• Bolt tensioner range of use: flanged pipe joints, heat exchangers, pressure vessels, rolling mills, presses, motors, crushers, diesel engines, valves, turbines, compressors, and more.

Work principle:

1. Nut is screwed by hand all the way into the supporting surface, and then the holder is setonthenut. Interchangeable adapter is screwed onto the exposed end of the stud. Length of adapter screwing with the stud must not be less than the diameter of the latter.

   

2. Pressure is applied to the cavity of the cylinder, and creates a capacity through which the stud is pulled.

   

3. Nut is screwed by hand all the way in without effort, and the pressure is released.

   

4. The cylinder is removed.