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The Hydraulic Bolt Tensioners
On the contrary to hydraulic torque wrenches the hydraulic bolt tensioners enable initial tensioning of bolts/studs without application any torque since the tensioning force is applied in line with the central line of the bolt/stud usually towards the expanding direction. Therefore the pre-tensioning force of bolts is independent on the friction coefficient. The bolt tensioners are actuated by means of a hand pump or electric pump or pneumatic pump with the output pressure of 800 or 1600 bars depending on the unit version. Optional and customized designs of the bolts tensioners with various values of pre-tensioning force, size and application procedures are available upon individual orders.
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Hex socket and insert bits torque wrench is designed to tighten and loosen bolts with used of standardized hex sockets and dedicated adapters (insert bits). Key components of wrenches are made of a lightweight alloy based on aluminium and titanium compounds whilst the ratchet and driving units are manufactured with use of “ultra steel” that makes them as sturdy and durable as titanium pieces.
The wrenches collaborate with hydraulic power packs (800 bar) that can be powered by an electric motor or a compressed air drive. The power pack is remotely controlled by means of a dedicated remote control unit. Operation in the fully automatic mode is as option. Bolts are tightened with the controlled torque up to the required limit, which is achieved by setting a specific oil pressure on a connected manometer, where the pressure corresponds to the desired torque. The torque values and associated oil pressures can be found on the table of torques that is attached to each wrench. Hydraulic wrench – principle of collaboration with applicable hex sockets and Allen pins. For the full range of sockets and pins please refer to the relevant directory.
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Low clearance hydraulic torque wrenches are made up of a main device, i.e. the drive unit and various adapter size (related to hex size). Casings of these devices are made of lightweight alloy based on aluminium and titanium compounds whilst the ratchet and driving units are manufactured with use of ‘ultra steel’ that makes them as sturdy and durable as titanium pieces. Hydraulic socket wrenches with adapters are perfectly suitable to tightening and loosening bolts on flange connections – it is why they are also called as hydraulic wrenches with adjustable torque for flanges. The wrenches collaborate with hydraulic power packs (800 bar) that can be powered by an electric motor or a compressed air drive. The power pack is remotely controlled by means of a dedicated remote control unit. Operation in the fully automatic mode is as option.
Bolts are tightened with the controlled torque up to the required limit, which is achieved by setting a specific oil pressure on a connected manometer, where the pressure corresponds to the desired torque. The torque values and associated oil pressures can be found on the table of torques that is attached to each wrench.
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OSSA Machinery Works offers a new hydraulic pumps designed to supply hydraulic bolt tensioners. The power pack offers unsurpassed technical parameters and enables very fast operation with a wide range of pre-tensioning devices.
Operation of the remote control device (RCD):
a) ON/OFF button to switch the electric motor on and off
b) depressing the button 1: pressure is supplied to advance the piston of the pre-tensioning unit until the already preset pressure is reached,
c) releasing of the button 1: pressure is kept constant, the piston remains in the advanced position. The motor remains off.
d) depressing the button 2: the unit is depressurized, the piston of the pre-tensioning unit is retracted to its initial position (lowered)
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Hex socket and insert bits torque wrench is designed to tighten and loosen bolts with used of standardized hex sockets and dedicated adapters (insert bits). Key components of wrenches are made of a lightweight alloy based on aluminum and titanium compounds whilst the ratchet and driving units are manufactured with use of “ultra steel” that makes them as sturdy and durable as titanium pieces. The wrenches collaborate with hydraulic power packs (800 bar) that can be powered by an electric motor or a compressed air drive. The power pack is remotely controlled by means of a dedicated remote control unit. Operation in the fully automatic mode is as option. Bolts are tightened with the controlled torque up to the required limit, which is achieved by setting a specific oil pressure on a connected manometer, where the pressure corresponds to the desired torque. The torque values and associated oil pressures can be found on the table of torques that is attached to each wrench. Hydraulic wrench – principle of collaboration with applicable hex sockets and Allen pins. For the full range of sockets and pins please refer to the relevant directory.