Why Does Hydraulic Bolt Tensioner Matter: How It Works

A bolt generates stress to hold items in place. The force must be around 80% equal to the bolt’s ultimate tensile strength to generate enough mechanical tension.

Bolt tensioning refers to the mechanical extension of a stud bolt. The material elongates when a nut is joined to a bolt. Once the tool is in place, the stress is relieved as the steel of the stud screw returns to its original shape before expanding. This mechanism is referred to as spring tension.

As the bolt returns to its original position, it tightens against the nut to provide the required force. The joint protects the application against failure during service. Before the nut is tightened, a hydraulic bolt tensioner can loosen the stud bolt to the appropriate preload level.

Industrial hydraulic bolt tensioner will last eternally if properly installed and maintained regularly. Bolt-tensioner systems ensure that you have the proper level of screw tension and hold it over time.

How To Operate A Hydraulic Bolt Tensioner

Before purchasing a hydraulic bolt tensioner to feed the job, consider the following features of the tensioning operation.

  • You should consider the bolt size, nut size, bolt grade, gasket thickness, washer diameter, open stud protrusion length, and bolt load requirements.
  • Then, verify the hydraulic bolt tensioner’s specifications to ensure it will deliver enough hydraulic pressure to accomplish the desired preload rate.

Hydraulic Tensioner Steps.

  1. Position the bolt tensioner across the free section that holds the stud bolt so it makes contact with the flange.
  2. Screw the tensioner’s puller downwards onto each load cell, connecting it to the cylinder piston.
  3. Use the appropriate hydraulic pressure to prepare the stud bolt as it begins to stretch.
  4. The tensioner will include a locking collar that may be turned with a tommy bar to force the nut onto the joint.
  5. Wind the screw down the joint’s edge until it is secured.
  6. Reduce the pressure applied to the hydraulic bolt tensioner.

When the hydraulic bolt tensioner reduces pressure and breaks down, the tension on the stud bolt is released. It clamps securely to the joint, producing the correct seal.

When a hydraulic bolt tensioner from hydraulic bolt tensioner manufacturers cannot fit onto every nut at the same time, two tensioning pressures may be required in some applications. Some bolts must be tensioned simultaneously, followed by the hydraulic bolt tensioners being transferred to the other bolts.

Types of Hydraulic Bolt Tensioning Systems

There are two main types of bolt-tensioning methods. Some devices tension every bolt simultaneously, while others tense up half at once and the other half shortly after. When you do half by half, a damaged bolt does not present a sudden issue because the remaining half remains in place. This makes it easy to locate and replace damaged bolts and achieve the desired tension level.

The two types of hydraulic bolt-tensioner technologies operate in essentially the same manner. They fit into the stud, loosen the wrench, and tension the bolt. Once the proper tension is attained, the nut gets torqued to the required torque specifications. This lets you achieve the optimal tension degree on each bolt and the most suitable mechanical usage for your gear.