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Tensioning Tooling

Hydraulic External Tensioner

A lightweight, compact and versatile bolt tensioner suited for applications where the bolted joint has a minimum of one stud diameter thread length exposed above the nut.

Hydraulic External Tensioner

Product Overview

Our Hydraulic External Tensioner series is a lightweight, compact and versatile line. The HET operates at a maximum pressure of 21,750 psi and utilizes high strength alloy steel components for long lasting performance.

The HET is the standard tensioning solution for applications where the bolted joint has a minimum of one stud diameter thread length exposed above the nut. This tensioner is a modular design which provides the widest range of flexibility possible. Different stud sizes can be accommodated by simply changing the puller screw, bridge, and socket while utilizing the same load cell.

The load cell is provided with either one or two quick connect nipples to allow fast and easy connections. Whether simply connecting to the oil supply or connecting multiple tensioners in series, our tensioner is fast and user friendly. The external surface of the load cell is knurled to allow for easy handling. Large tensioners (exceeding 50 lbs) include eye bolts for safe lifting points.

Aside from the standard catalog product, we can customize any Hydraulic External Tensioner to better fit your application. Examples of modifications include special fittings, special bridges, and spanner sockets for 12-pt nuts. Beyond small modifications, a completely custom tensioner can also be designed to tailor to your specific needs.

Key Features

  • Modular Design Provides Flexibility
  • Accurate and Repeatable Stud Loading
  • Faster and Easier Flange Closure
  • Standard and Custom Designs Available
  • Optional Spring Return
  • Operates at maximum 21,750 psi
  • Quick connect nipples for easy connection
  • Eye bolts on large tensioners for safe lifting

Applications

Pipe Flanges
Turbine Cases
Coupling Hardware
Compressor Flanges
Steam Turbines
Gas Turbines
Pressure Vessels
Heat Exchangers
Valve Assemblies

Technical Specifications

Maximum Operating Pressure21,750 psi (1,500 bar)
MaterialHigh Strength Alloy Steel
DesignModular — interchangeable components
Connection TypeQuick Connect Nipples (1 or 2)
Thread CoverageMin. 1 stud diameter above nut
CustomizationStandard and fully custom designs
Large Tensioner HandlingEye bolts for safe lifting (>50 lbs)
Product Demo

See It In Action

Watch a live demonstration of our Hydraulic External Tensioner.

Ready to Order or Need Help Specifying?

Our engineers are available to assist with product selection, sizing, and custom configurations.