Hydraulic torque wrenches ('hydraulic wrenches') are designed to fasten bolts to a specified torque. Like common-or-garden manual torque wrenches 'on steroids', hydraulic torque wrenches are widely used for difficult or heavy-duty industrial bolting applications such as flange bolting.
Since their invention in 1960s USA, hydraulic wrenches have evolved considerably with lightweight variants, smaller nose-radius dimensions for access to confined spaces, the use of specialised alloys and the ability to run multiple tools off a single power source now being commonplace.
Hydraulic Wrenches - A proven alternative to conventional wrenches
Hydraulic torque wrenches generate their torque (twisting or rotating force) by hydraulic means alone. They are also self-ratcheting and incorporate an accurate method for determining the amount of torque applied. As an alternative to conventional impact wrenches, they're much quieter, lighter and more accurate - while fulfilling the basic requirement of a torque wrench to deliver an exact torque value to a torque-critical fastening.
Four-bolt torquing with hydraulic wrenches
Hydraulic wrenches are often deployed individually. But for many critical applications, four-tool bolting adds further reassurance that joints have been made with integrity. Large flange couplings often include multiple bolts (often as many as 16 or 32 bolts), all of which must be fastened to prescribed torque settings.
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