HYTORC AVANTI High-Torque Hydraulic Torque Wrench

The HYTORC AVANTI is the largest line of HYTORC hydraulic torque wrenches. The cut sheet states that it offers the widest range of torque output, with a maximum of more than 130,000 ft-lbs (187683 Nm), and that it has been used by industry professionals for over two decades. Where the other HYTORC wrenches top out at the tens of thousands of newton-metres, the AVANTI is the tool for very large studs on pressure vessels, wind-turbine and tower flanges, mill equipment and heavy structural joints.

Reaction drive and torque-and-angle option

The AVANTI features a patented, industry-first reaction drive. Twisting forces are taken coaxially, so the tool is stable without a back-end reaction arm and the risk of damage from twisting forces is reduced. A side or coaxial reaction arm lets the user position the tool around the bolt regardless of the arm orientation. An optional Torque and Angle Dial driver gives precise readings for applications where angle control is specified. The tool works with conventional bolting equipment as well as with the HYTORC Nut and HYTORC Washer, and a lock-up release lever frees the wrench from the application.

Technical specifications

Model sizes

The table lists the sizes shown on the manufacturer cut sheet. The product page also names intermediate models (AVANTI 1, 3, 5 and 10), so check the current model list when quoting a specific torque.

Planning a high-torque job

For very large studs the key questions are the stud stress target, the lubrication factor and the access around the nut. Tool weight rises quickly above AVANTI-35, so lifting equipment or a support arm will be needed on the larger sizes, and the reaction path must be checked so that the load is carried by a surface that can take it. Select the drive size from the socket or link, confirm the hex or washer dimension, and decide whether a washer or nut system is to be used. Pump size must be able to supply the larger piston volume, and a hose set with quick couplers is a separate item. Because the AVANTI range is so wide, buyers often need two or three sizes for one project; list every stud size and torque on the enquiry so the sizes can be matched without overlap, and note the working temperature and any corrosion or ATEX requirements of the site.

How the HYTORC AVANTI works

Hydraulic pressure from a pump pushes a piston inside the wrench. The piston turns a square drive through a ratchet, and the drive turns the socket on the nut. Torque goes up with the oil pressure. The patented reaction drive takes the twisting force along the axis of the tool, so the wrench stays steady without a back-end reaction arm.

Where the AVANTI is used

• Large studs on pressure vessels
• Wind turbine and tower flanges
• Mill equipment
• Heavy structural joints
• Jobs that need very high torque

Selection checklist for the AVANTI

• Torque needed in Nm or ft-lbs
• Model size from AVANTI-.7 to AVANTI-130
• Square drive size
• Weight of the tool
• Height and radius for the space
• Reaction arm position
• Torque and Angle Dial option
• Use with the HYTORC Nut or Washer

Installation, commissioning and maintenance notes for the AVANTI

Choose the model by the torque with margin, and fit the right socket on the drive. Set the reaction arm against a firm point. Connect the hoses to the pump and check the pressure for the torque wanted. Release the wrench with the lock-up release lever. Keep the hoses and couplings clean and check them for leaks.

Requesting a quotation for the HYTORC AVANTI

Please send the torque needed, the bolt size and the quantity. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

AVANTI torque range

The cut sheet shows 156 to 187,683 Nm for the line.

AVANTI weight

The weight runs from 1.41 to 265.91 kg across the models.

AVANTI height and radius

The height runs from 106 to 493 mm and the radius from 25 to 135 mm.

AVANTI square drive

The square drive runs from 3/4 inch to 3-1/2 inch.

AVANTI reaction drive

The reaction drive is patented and takes the twisting forces on the axis of the tool.

AVANTI reaction arm

A side or coaxial reaction arm lets the user place the tool round the bolt.

AVANTI angle option

The optional Torque and Angle Dial driver gives readings where angle control is specified.

AVANTI nut and washer

The wrench works with normal bolting gear and with the HYTORC Nut and HYTORC Washer.

Tool records for the AVANTI

Record the model, the torque set and the date of each job.

Choosing the right AVANTI model

Check the current model list when you quote a given torque, because the product page names more sizes than the cut sheet.

Documents and quotation

The AVANTI cut sheet is attached. Please send the stud diameter, grade, target torque and angle requirement for a quotation; Seven Star LLC is an independent supplier. Related equipment appears in Material Handling and Lifting Equipment.