tentec hydraulic nuts

Series: BCHN

Tentec Nuts replace existing hexagon nuts to give a rapid, accurate and uniform Bolt load to any bolted joint. The Tentec Nut offers a method of bolt tensioning multi-bolt applications which greatly improves the integrity of the joint. The speed in which joints can be tensioned and detensioned shows an extraordinary time saving over conventional detachable bolt tensioning systems. An existing Oil company user of Tentec Nuts has recently reported a massive time saving of 1750% over their old bolt tensioning system
   
 

The Principle...

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Hydraulic pressure is applied simultaneously to each Tentec Nut. All frictional factors connected with conventional bolt tightening methods are alleviated since Tentec Nuts apply a direct axial force to the bolt which generates a bolt elongation.This elongation/tension is permanently retained by means of the load retaining collar.

Tentec Nuts have been designed to be as compact as possible, in order to allow adjacent fitment on as many applications as possible. In most cases they are designed to produce a residual bolt stress of 45000 lbs/In2 (310N/mm2) which is more than adequate for most bolted joint applications. As pressure is applied to the Tentec Nuts not only does the bolt elongate but also joint compression occurs.

Since many applications incorporate some form of gasket, this joint compression can be substantial, in order to withstand this joint compression all Tentec Nuts are capable of considerable piston movement. This allows the Tentec Nuts, in most cases, the ability to tension a complete joint in only one pressurisation sequence, this can result in extremely high time savings.

Product Features

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  • Standard Tentec Hydraulic Nuts are suitable for use in temperatures up to 100ºC
  • For temperatures above this level special seals are available, contact Tentec for further details
  • The use of machine cut Polyurethane seal, ensure a reliable leak free Tensioning system
  • Tentec Nut protection caps are available to protect against corrosion
  • Tentec Nuts can be used with Spherical washers where joint members are badly out of square
  • Where the standard Tentec Nuts are not suitable, special designs are available on request

TENTEC HYDRAULIC NUTS TYPE - BOTTOM COLLAR

Hydraulic pressure is applied simultaneously to each Tentec Nut. All frictional factors connected with conventional bolt tightening methods are alleviated since Tentec Nuts apply a direct axial force to the bolt which generates a bolt elongation. This elongation/tension is permanently retained by means of the load retaining collar. Tentec Nuts have been designed to be as compact as possible, in order to allow adjacent fitment on as many applications as possible. In most cases they are designed to produce a residual bolt stress of 45000 lbs/In2 (310N/mm2 ) which is more than adequate for most bolted joint applications. As pressure is applied to the Tentec Nuts not only does the bolt elongate but also joint compression occurs. Since many applications incorporate some form of gasket, this joint compression can be substantial, in order to withstand this joint compression all Tentec Nuts are capable of considerable piston movement. This allows the Tentec Nuts, in most cases, the ability to tension a complete joint in only one pressurisation sequence, which can result in extremely high time savings
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Tentec Hydraulic Nuts Type - Top Collar

Top Collar Hydraulic Nuts feature the same benefits as the Bottom Collar type Hydraulic Nuts. The Top Collar derivative is ideally used where the nut is sunk into a pocket or spot face. The load retaining collar is situated at the top of the hydraulic nut allowing for easy access by the user.
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Why Use Hydraulic Nuts?

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Consistent

Using multiple Hydraulic Nuts on a bolted joint gives a much improved uniform bolt load across all bolts.
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Axial Bolt Load

Bolt load is applied axially to the bolt. Inconsistencies such as friction, bending and lubricant are not a factor when using Hydraulic Nuts. No torsional stresses are involved
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Fast Tensioning

Multiple Hydraulic Nuts offer aq uick and accurate method of tightening a bolted joint
 

Accurate

Bolt load is directly proportional to the pressure applied to the Hydraulic Nut.
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© Copyright 2015 kNm Hydraulikk
kNm Hydraulikk er Atlas Copcos foretrukne boltingpartner
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