TORCUP HYDRAULIC NUTS BOTTOM COLLAR
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Hydraulic Nuts Series: Bottom Collar Type Simplified procedure. Note: for clarity the pressure hydraulic hose is not shown on the following diagrams. TorcUP Nuts replace existing hexagon nuts to give a rapid, accurate and uniform bolt load to any bolted joint. The TorcUP 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 savings over conventional detachable bolt tensioning systems. An existing oil company has recently reported a massive time saving of 1750% over their old bolt tensioning system, through the use of TorcUP hydraulic nuts. The Principle Assemble the Hydraulic Nut onto the bolt to be tensioned. PRESSURE HELD Pressurise the hydraulic nut to the target pressure. The bolt will stretch and a gap will appear at X. Hold the pressure. Hydraulic pressure is applied simultaneously to each TorcUP Nut. All frictional factors connected with conventional bolt tightening methods are alleviated since TorcUP Nuts apply a direct axial force to the bolt which generates bolt elongation. This elongation/tension is permanently retained by means of the load retaining collar. TorcUP Nuts have been designed to be as compact as possible,allowing more nuts to fit on an application. In most cases they 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 TorcUP 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, all TorcUP Nuts are capable of considerable piston movement. This allows the TorcUP Nuts, the ability to tension a complete joint in only one pressurization sequence, which can result in significant high time savings. Main Features and Benefits • Standard TorcUP Hydraulic Nuts are suitable for use in temperatures up to 100ºC. For temperatures above this level special seals are available, contact TorcUP for further details • The use of machine cut polyurethane seals, ensures a reliable leak free Tensioning system • TorcUP Nuts can be used with spherical washers where joint members • Where the standard TorcUP Nuts are not suitable, special designs are available on request Using a tommy bar, rotate the load retaining collar up against the main body of the nut. Release the pressure. The bolt is loaded. TorcUP products are subject to continual development and TorcUP reserves the right to make changes in the specification and design of there products without prior notice. All rights reserved. Reproduction in whole or in part without the permission of TorcUP Limited is prohibited. 1025 Conroy Place Easton, PA 18040 USA Telephone: +1 610-250-5800 Fax: +1 610-250-2700 e-mail: sales@torcup.com website: www.torcup.com

Use either a TorcUP air driven pump unit or a TorcUP hand operated pump unit to apply pressure to TorcUP Hydraulic Nuts. Notes Maximum working pressure = 33000 psi : 2275 bar General Tool Specifications If the standard Hydraulic Nuts are not suitable TorcUP offers special designs on request. Associated Equipment High pressure flexible hose Refer to associated technical datasheet High pressure Hand Pumps High pressure Air Pumps