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Foundation bolts like on wind turbines can be tightened precisely with ITH Bolt Tensioning Cylinders types ESH and MSH (hollow piston design)

Hydraulic Bolt Tensioning Cylinders type ESH, single-stage, hollow piston

Hydraulic Bolt Tensioning Cylinders type ESH - hollow piston

Open design (hollow piston) enables the hydraulic bolt tensioning cylinder to be used for long protruding threads like on foundation bolts, heat exchangers or flanges.

Flexible locknut

  1.  Enables fast installation of the bolt tensioning cylinder on long protruding threads
  2.  The preload force can be transferred into the bolt connection by:
  3.  ITH Locknut
  4.  Standard hexagon nut
  5.  ITH Splitnut

Patented ITH safety concept

  • Safety concept includes ITH patented cycle counter and patented safety protection cap with handle
Automatic piston return

  • For fast bolting procedures

 

Tool data

Application
Features
Technical data
Type ESH – foundation bolt tensioning on a wind turbine with ITH Locknut 
Type ESH – Multi-Tensioning on a heat exchanger with ITH Splitnut 
Type MSH – long threaded rods with a standard hexagon nut 
Type ESH – foundation bolt tensioning on a wind turbine with ITH Locknut
Type ESH – foundation bolt tensioning on a wind turbine with ITH Locknut

Typical application of an ITH bolt tensioning cylinder type ESH on foundation bolts of a wind turbine, including an ITH Locknut. The square drive on top of the ITH Locknut enables the use of a battery nutrunner to accelerate the installation.

Type ESH – Multi-Tensioning on a heat exchanger with ITH Splitnut
Type ESH – Multi-Tensioning on a heat exchanger with ITH Splitnut

ITH Multi-tensioning: 4 bolts of a heat exchanger are tightened simultaneously and evenly by the use of 4 ITH bolt tensioning cylinders type ESH.

Special feature: The preload is transferred into the bolt connection by the use of an ITH Splitnut. The ITH Splitnut features a lever mechanism which allows to open the Splitnut radially for fast positioning on the protruding thread. Time consuming turning down of a nut can be avoided.

Type MSH – long threaded rods with a standard hexagon nut
Type MSH – long threaded rods with a standard hexagon nut

Long threaded rods can be used for the tensioning or pushing of objects or to keep them in position. In this case a tower segment of a wind turbine is corrected by use of ITH bolt tensioning cylinder type MSH.

The preload force is transferred by a standard hexagon nut.

 
 
Type ESH – foundation bolt tensioning on a wind turbine with ITH Locknut
Das ITH-Lieferprogramm umfasst sämtliche Werkzeuge. Ziehende und drehende Werk- zeuge, Mutternsprenger, Handwerkzeuge, Drehwinkel-Tools und vieles mehr...
1
Type ESH – Multi-Tensioning on a heat exchanger with ITH Splitnut
Das ITH-Lieferprogramm umfasst sämtliche Werkzeuge. Ziehende und drehende Werk- zeuge, Mutternsprenger, Handwerkzeuge, Drehwinkel-Tools und vieles mehr...
2
Type MSH – long threaded rods with a standard hexagon nut
Das ITH-Lieferprogramm umfasst sämtliche Werkzeuge. Ziehende und drehende Werk- zeuge, Mutternsprenger, Handwerkzeuge, Drehwinkel-Tools und vieles mehr...
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Type ESH / MSH – flexible lock nut 
Typ ESH / MSH - optional features 
Type ESH / MSH - modular design 
Type ESH / MSH – flexible lock nut
Type ESH / MSH – flexible lock nut

The “open” hollow piston design enables fast installation of the bolt tensioning cylinder on long protruding threads.

The preload force can be transferred into the bolt connection by:
1. ITH Locknut (in the picture)
2. Standard hexagon nut
3. ITH Splitnut

Typ ESH / MSH - optional features
Typ ESH / MSH - optional features

Optional features in the picture:

  1. ITH patented cycle counter at the hydraulic block: counts and displays pressure cycles and offers information for tool maintenance management easily.
  2. NIOX coating: Extra Nickel-Chromium coating offers extra prevention from corrosion.
  3.  ITH patented protection cap with handle: Protects hydraulic connector, increases ergonomic handling and work safety.
  4.  Accelerates and offers torque-controlled turning down nuts by use of a hand torque wrench (available square drives ¼” to ½”).

Type ESH / MSH - modular design
Type ESH / MSH - modular design

Flexible lock nut

Dirt protector

  1.  The pressure chamber is protected from impurity by a protecting collar on top of the cylinder
Supports
  1. One BTC can be equipped with different supports to match the nut and washer design
Supports can be designed to match:
  1.  DIN EN ISO, ASME, ANSI, MSS, HV, national standards and more
  2.  ITH Roundnuts RMS or RMZ, IHF Roundnuts
  3.  Heavy Hex Nuts
  4.  Hexagon nuts, Roundnuts with radial holes or custom specific nuts
  5.  Further
Turning sleeve

  • The turning sleeve is the part which contacts the nut radially. Therefore, it can be exchanged to match different nut and washer set-ups.
Hydraulic connectors
  •  Vertical / horizontal
  •  With or without ITH patented cycle counter
  •  With or without ITH Multi-tensioning
ITH patented protection cap

  • Increases work safety and ergonomic handling, protects the hydraulic connector

 
 
Type ESH / MSH – flexible lock nut
Das ITH-Lieferprogramm umfasst sämtliche Werkzeuge. Ziehende und drehende Werk- zeuge, Mutternsprenger, Handwerkzeuge, Drehwinkel-Tools und vieles mehr...
1
Typ ESH / MSH - optional features
Das ITH-Lieferprogramm umfasst sämtliche Werkzeuge. Ziehende und drehende Werk- zeuge, Mutternsprenger, Handwerkzeuge, Drehwinkel-Tools und vieles mehr...
2
Type ESH / MSH - modular design
Das ITH-Lieferprogramm umfasst sämtliche Werkzeuge. Ziehende und drehende Werk- zeuge, Mutternsprenger, Handwerkzeuge, Drehwinkel-Tools und vieles mehr...
3
Hydraulic Bolt Tensioning Cylinder type ESH for long protruding threads.
Table of technical data
 
 

*The hydraulic bolt tensioning cylinder series for foundation bolts or long projecting threads includes different designs to match the requirements of the common bolt standards:

1. Types ESH – single-staged, hollow piston
2. Types MSH – multi-staged, hollow piston
3. Type ES – single-staged, “closed” cover
4. Type MS – multi-staged, “closed” cover

Types ES and MS designs consider larger tool heights to match long projecting threads.

Contact your local person in charge for consultation, technical questions, for individual designs or other bolt specifications. We would be pleased to give advice.

Technical enhancements or modifications reserved.

Contact your local person in charge

Contact ITH for a free consultation regarding bolting tools, fasteners or service in bolting technology

Use the ITH global network to find your local person in charge.

Objective technical advice

Being a whole system supplier we are not determined to one specific bolting method - Therefore we advise you objectively and offer the best technical and cost-effective solution.

Contact us for a free consultation

Contact us on any questions regarding your bolt connection or for any technical questions. We advise you free of charge and offer a free on-site inspection.

 

Bolt Tensioning Cylinder type ESH: related products