Tensioner Tools

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INTRODUCTION - ‘PRS Verse’ tensioner nut and bolt generates a big screw preload force by tightening the pressure screws at a relatively low tightening torque which enables large diameter bolts to be tensioned to high and required pre-loads. They are quick to install using a multi-jack screw system. The effort required to tighten a very large diameter bolt is reduced to a great extend and the tightening process is even quick.  PRS Verse mechanical nut and bolt tensioner use the multi-jack principle tensioning of bolts. This is world proven technology used for successful installations. Mechanical tensioners are easy to work with and provide a mechanical advantage with their unique design, which divides the load among multiple small jack-bolts. Correctly installed, connections are reliable, stay tight indefinitely and disassemble easily for planned maintenance. Even the largest nut and bolts are safe and can be installed or removed by a single person with ordinary hand tools.  These solutions to solve the bolting challenges where millions of mechanical tensioners are used globally to secure bolts on critical applications. We offer a full life cycle warranty for mechanical tensioner enabling to shape modern living in the years to come. As there is no nut rotation during tightening or clamping the nut, operation can be performed in a defined / available space and torsional stresses or thread damage are eliminated this assures the positive locking of joint.  

Working principle / specification

OPERATING PRINCIPLE - Mechanical tensioners are designed as direct replacements for conventional nuts and bolts. Mechanical tensioners can be replaced to a new or existing bolt, stud, threaded rod or shaft. The main thread serves to position the tensioner on the bolt or stud against the load-bearing surface through the pressure washer. Once it is positioned, actual tensioning of the bolt or stud is accomplished with simple hand tools by applying the small torque to the jack-bolts which encircle the main bolt. The jack bolts transfer the preload evenly into the main bolt and, consequently, on to the joint. The main bolt is tightened in pure tension without any torque generation. By tightening the jack-bolts, a heavy axial force is generated. This force is directed against a pressure washer. Jack-bolts have a very small friction diameter and can therefore create a high thrust force with relatively little torque input. The loads are transferred through the nut body which is positioned on the main bolt by hand rotation. A pressure washer is used to transfer the force while protecting the flange face. The axial force of jack-bolts and the opposite reaction force of the main bolt head create a strong clamping force on the flange. The axial force from the jack-bolt creates an equally strong reaction force in the main bolt. You can trust our products; we guarantee that our mechanical tensioner products will stay in place and fulfil their function for the entire lifetime of the bolted connection.

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Product features

Higher preload, Tightening in pure tension. ·      

A single worker can work for massive assemblies. ·      

Preload prevent bolts from loosening by vibration. ·      

Better bolted joint, generating higher preload.  ·      

Custom solutions supplied to your application. ·      

Eliminate dangerous pinch points. ·      

Easier to install in limited space. ·      

Accurate tensioning, even loading. ·      

Accurate preloads prevent joint loosening. ·      

Tightening in pure tension eliminates thread galling. ·      

Quick and easy dismantling reduces downtime.  

Material of construction


Applications

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