Hydraulic Bolt Tensioning Cylinder type ES, single-stage

This ITH Bolt Tensioning Cylinder type ES 27 and the hydraulic pump ITH Micro-MAX 72 with the digital remote control are used on the foundation connection (M27, bolt quality 10.9) at a brewery exhaust air unit. After reaching the full hydraulic pressure the hex nut is tightened down via the direct gear drive with the help of a hand torque wrench. The hand torque wrench allows for controlled torque to be applied to each nut.
The compact pump series Micro-MAX are designed for service jobs.

Blade bearing connection of a wind turbine, tensioned with ITH BTC type ES 36 - 670 (M36 with 670 kN tensioning force). This BTC has a flexible carrying strap, a hydraulic block with cycle counter and a burnished surface coating.

Four Bolt Tensioning Cylinders type ES are pre-mounted to tighten the bolts of a flange cover simultaneously and precisely (ITH Multi-Tensioning). After the fast installation of the 4 tensioners they are all connected to a 4-way distribution block and connected to an ITH hydraulic pump. The ANSI flange cover is closed in a precise and uniform way, minimizing the risk of leakages.

Simultaneous and uniform tensioning of the 4 cylinder head bolts M30x2 (ITH Multi-tensioning) of the motor with Bolt Tensioning Cylinder type ES 30 -430 (Tensioning force 430 kN).

The ITH safety concept for bolt tensioning cylinders include: patented cycle counter, patented safety handle, and patented safety fracture device.

• Counts each pressure cycle of the tool and clearly displays the current cycle
  
• Offers an easy way to track working procedures for users
  
• Improved tool management by tracking cycles for maintenance intervals and service, which promotes safe working conditions

Increases the operating speed of the tool. The integrated automatic piston return pushes the piston back to its original starting position when the hydraulic pressure is released (The change bushing position is even with the cylinder cover).

Accelerating the assembly: setting up the Bolt Tensioning Cylinder the inside turning sleeve automatically adjusts and contains the nut.
The control notch on the foot of the support offers an easy visual inspection to check, if the nut lays even with the surface before pressurizing the Bolt Tensioner.

ITH Bolt Tensioning Cylinder type ES consists of a modular design:

1.  Adapt to different thread profiles with interchangeable parts. One Bolt Tensioner can fit different thread profiles by using the corresponding change bushing.
2. Adapt to different nuts and washers with interchangeable parts. The support of the tool can be changed to accommodate all variations of nut and washer set-ups.
   - Pin drive (left): Support with access window for tightening the nut using a turning pin. Can be used directly with slotted round-nuts or with a slotted Turning Sleeve fit for hexagon and other custom faced nuts.
   - Gear drive (right): Standard Support with attached gear drive for tightening the nut using a hand ratchet. Can be used with all hexagon and other custom faced nuts.
3. Various hydraulic block options are available according to the application requirements.
   

Various hydraulic connection configurations can be choosen due to application requirements:

1. Standard: horizontal with cycle counter
2. Multi-tensioning hydraulic connection:  male and female couplers on the hydraulic block, with or without cycle counter
3. Without cycle counter: horizontal or vertical.

All horizontal connections are compatible with optional safety handle (on the left).

By a measurement slot - a hole throughout the change bushing - Bolt Tensioning Cylinders type ES are ready for optional digital documentation system (PSD / PD System). With an attachable digital measurement gauge the realized bolt elongation of each bolt can be measured. This allows to compare the realized force of each bolt connection among a series of bolting operations.

The carrying strap is durable yet flexible for better handling. For larger size tensioners ITH offers pneumatic spring balancers for easy lifting and handling. Furthermore the wholes on the sides can be equipped with ring loops for the transport by cranes.

The gear drive controls the nut rotation during the tensioning process and is compatible with standard hand ratchets (1/2” or 1/4”).