• Griphold Tools Private Limited

Bolt Tensioners

Griphold Tools offers Bolt Tensioners. These are available with maximum pressure 1500 bar. Features: compact, light, economical, easy to use; fit single specification tensioner with high precision; can match hand pump, electric pump, some tensioners is used at the same time; auto spring reposition design; and fit for frequent use and stroke protection. Operation: Basic position: place the SSV onto the bolt to be tensioned and screw the thread sleeve down to the piston surface. A hydraulic high-pressure pump, through a flexible hose, feeds oil into the space between cylinder and elongation and compression. As the hydraulic pressure increases, the resulting axial force elongates the bolt and compresses the flanges. Thus, the lock nut lifts from the flange. On positioning of the lock nut, the tensioning force is achieved and the lock nut can be turned down to contact the flange. When releasing the oil pressure, the desired tensioning force remains in the bolt connection.