Delta Series

Delta Series Tensioners —

Features and Benefits:
Bolttech is known for solving the toughest bolting problems found in the industrial world today. These basic practices go into every design and manufacturing detail of our stud tensioning line of tools. We design our tensioners with quality, simplicity and versatility of the specific application and user in mind. Bolttech’s Delta Series bolt tensioners maximize efficiency and minimize size for specific single stud size applications.

• Patented high pressure/low friction seals are designed to outlast the competition and provide accuracy within .5% with a calibrated pumping unit.
• Environmentally friendly, using water-filled tensioning systems.
• The direct axial load is applied to the bolt and inaccuracies created through friction are alleviated.

• Custom Solutions
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• Download/View Catalog
• Tensioning Manual
• Hydraulic Nut Manual
• View Specifications Chart

Delta Series Hydraulic Nuts – Bolttech’s Delta Series Hydraulic Nuts replace existing hexagon nuts to give a rapid, accurate and uniform bolt load to any bolted joint. They offer a method of tensioning multi-bolt assemblies (such as a flange) which greatly improves the integrity of the joint. The most important benefit of using the Delta Series Hydraulic Nut solution is that the design/maintenance engineer has a system available that can give the accurate bolt loads required to ensure joint integrity. The fundamental advantage of this product is that direct axial load is applied to the bolt and inaccuracies created through friction are alleviated.

Delta Series Hydraulic Pumps –

TP30K-SS	TP30K-Z	TP30K-H	Hand Pump

A hydraulic bolt/stud tensioner is a simple tool consisting of four primary parts. Starting with the first to be applied, the nut retaining disk slides over the nut and has holes in it to be turned with a device known as a tommy bar. The next part is the bridge. This keeps the entire tensioner just hovering above the nut and around the bolt/stud. Next the hydraulic load cell, which is attached to the bridge, surrounds the bolt or stud. With the socket, bridge, and load cell in place, the puller is now screwed down into the load cell onto the bolt/stud. Now the tensioner is completely attached and ready for service.

High-pressure fluid from our TP30K™ pumping unit pressurizes the hydraulic load cell, which creates a force that allows the tensioner to actually stretch the stud. When this happens, the nut lifts off the flange. The nut is returned to its seated position by turning the nut retaining disk with a tommy bar. With the nut tight against the flange, the pressure in the load cell is released and the stud remains stretched with the load locked in.