
Hydraulic Nut PG13
Axial Bolt Tensioning using High-Pressure Hydraulic
Cost-reducing - Powerful - Reusable



Basic setup
Screw the Hydraulic Nut (HM) on the bolt to be pretensioned, and down to the flanges' surface. A hydraulic high-pressure generator pumps the oil through a high-pressure hose into the space between cylinder and piston. The hydraulic pressure rises.

Piston

Bolt to tension

Cylinder

Bolt elongation
Through the rising pressure and the resulting axial force, the bolt is elongated and the flange parts are compressed. The lock nut is lifted off the cylinder. When the preset pre-tensioning force is achieved, the pressure supply is stopped.

Locking Nut

Screwing the lock nut
The pre-tensioning force has been achieved and the lock nut is turned by hand down to the stop face of the cylinder. Thus, the pre-tensioning force is maintained within the screw joint and the hydraulic may be released. The Hydraulic Nut remains on the bolt connection.
Advantages
Features HM PG13
- optimum way of generating the same pre-tensioning force in all screws simultaneously
- shortest set-up times
More Hydraulic Nuts

Versions



Areas of Application

Quality Assurance
All Bolt Tensioning Tools and Hydraulic Nuts are checked for material quality, dimensional accuracy, proper operation, and pressure resistance.
They are subject to quality assurance measures during order execution and delivered with detailed documentation.
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Services
SSV and HM are, of course, delivered packaged, ready for installation and operation.
SCHAAF SSV and HM are user-friendly, reliable and are manufactured in accordance with the highest level of technical know-how. Our highly-motivated
staff will be pleased to train your personnel, in situ or at our works, in the general handling of high-pressure equipment.
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