Compared with traditional electric or manual wrenches, hydraulic nuts have an irreplaceable position in heavy industry: 

No torque friction loss: Most of the force from traditional wrenches is lost on thread friction, while hydraulic nuts directly stretch the bolts, with extremely precise control of the preload force (usually within a ±5% error). 

High synchronization: Multiple hydraulic nuts can be connected to a single pump simultaneously, ensuring uniform force on the entire flange surface and preventing leakage caused by uneven stress on the gasket. 

Non-destructive: Since no torsional force is generated, the thread surface is not damaged and galling does not occur. 

Extremely efficient: For large bolts (such as M100 and above), traditional methods might require several people a whole day, whereas hydraulic nuts can complete the task in a few minutes.