Hydraulic Nut System Configuration
The most efficient use of stud bolt tensioning tools is where every stud bolt is tensioned simultaneously; 100% stud bolt to hydraulic nut ratio. Hydraulic nuts can be fitted to either one or both sides of the bolted joint depending on accessibility.
Generally with hydraulic nuts, 100% of the bolts are tensioned simultaneously.
1 | Link hose |
2 | Link hose to the pump |
1 | Link hose |
2 | Link hose to the pump |
3 | It is OK to leave a female coupler unconnected |
Hydraulic Nut Arrangement - 100% Configuration
On some applications it is not be possible to fit hydraulic nuts to every stud bolt from the same side of the bolted joint. In that case it is necessary to stagger the hydraulic nuts over both sides of the bolted joint. In either configuration, it is normal practice to fit the stud bolts in such way so adequate thread protrudes from the side of the joint that the hydraulic nuts will be fitted. See the pictures below.
WARNINGProjectile Hazard
Never pressurize an unconnected male coupler. Male couplers are not designed to withstand high pressure, in the unconnected mode. Pressurizing an unconnected male coupler can lead to serious bodily injury or death.
If you are left with an unconnected male connection, check the hydraulic hose assembly and correct the error.
It is safe to pressurize an unconnected female connection. The end, unconnected port on a chain of tensioners or hydraulic nuts should contain a female coupling or a blanking plug.
Joint side A: Alternate bolts on a joint showing adequate bolt protrusion.
Joint side B: Alternate bolts on a joint showing adequate bolt protrusion.
