Hydraulic Tensioner Couplings

Hydraulic tensioning is the ideal method for tightening bolted connections. Hydraulic tensioning eliminates inaccuracies and helps achieve correct bolt loading in critical connections. At HTI, we’ve been building hydraulic tensioners and nuts since 1986. 

What is a Dual Hydraulic Tensioner Coupling?

A single tensioner, used alone, can have a single hydraulic coupling. When multiple tensioners are used together to tension multiple studs in an assembly simultaneously to achieve uniform bolt loading, a second hydraulic coupling is typically included on each tensioner so that they can be hydraulically chained. 

The hydraulic pump goes into one of the ports on the first tensioner, and then that tensioner is connected to the next in line using the second port.  Each subsequent tensioner is connected to both the previous and next in line. The last tensioner in the line will have a plug in the second port.  When pressure is applied, all hydraulic tensioners will receive the same pressure and will apply an identical bolt load at the same time.