Manufacturer of Hydraulic Bolting Solutions ZLD series-hydraulic bolt tensioner specially for bridge •Maximum working pressure 150Mpa •Automatic return mechanism design. •Red overstroke warning line to ensure operator safety. •Polishing surface treatment •High pressure, light weight Bolt size SJD series-hydraulic bolt tensioner for bridge lock clamping •Maximum working pressure 150Mpa •Automatic return mechanism design. •Red overstroke warning line to ensure operator safety. •Polishing surface treatment •High pressure, light weight •One tensioner can be used for different size bolts. Dimension (mm) Bolt size