STU Range - Metric | Hi-Force | Bolt Tensioners | HES
Hi-Force product

STU Range - Metric

Sub-Sea Bolt Tensioners - Metric

  • Single acting design with manual piston retraction
  • High grade alloy steel construction
  • Simple two piece design for easy operation by divers subsea
  • Visible maximum piston stroke indicator
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Product Overview

Hi-Force STU series sub-sea bolt tensioners are designed and manufactured to suit the demanding requirements of divers operating in harsh sub-sea environments. With an easy to operate two piece design comprising of a quick fit/release threaded puller and a hydraulic load cell with integral bridge and an extra long 30 mm piston stroke to reduce re-setting operations, Hi-Force STU series sub-sea bolt tensioners offer a consistent, reliable and cost effective method of tensioning sub-sea bolted joints.

  • Capacities from 256 to 2483 kN
  • Bolt sizes M24 to M90 diameter
  • Working pressure 1500 bar

Technical specifications

Model NumberQuick fit pullerBolt Thread SizeCapacityEffective area cm2Stroke mmWeight kgTommy Bar
kNtonnes
STU1-24QFP1-24M24 x 325626.117.1203.4TTB06
STU1-27QFP1-27M27 x 325626.117.1203.4TTB06
STU2-30QFP2-30M30 x 3.543043.928.7306.0TTB08
STU2-33QFP2-33M33 x 3.543043.928.7306.0TTB08
STU2-36QFP2-36M36 x 443043.928.7306.0TTB10
STU3-39QFP3-39M39 x 455350.436.89307.5TTB10
STU3-42QFP3-42M42 x 4.555350.436.89307.5TTB10
STU4-45QFP4-45M45 x 4.575677.150.4309.8TTB10
STU4-48QFP4-48M48 x 5756077.150.4309.8TTB12
STU5-52QFP5-52M52 x 51168119.177.93014.5TTB12
STU5-56QFP5-56M56 x 5.51168119.177.93014.5TTB14
STU6-60QFP6-60M60 x 5.51649168.1109.93022.8TTB14
STU6-64QFP6-64M64 x 61649168.1109.93022.8TTB16
STU6-68QFP6-68M68 x 61649168.1109.93022.8TTB16
STU6-72QFP6-72M72 x 61649168.1109.93022.8TTB16
STU7-76QFP7-76M76 x 62483253.2165.63035.6TTB16
STU7-80QFP7-80M80 x 62483253.2165.63035.6TTB16
STU7-85QFP7-85M85 x 62483253.2165.63035.6TTB16
STU7-90QFP7-90M90 x 62483253.2165.63035.6TTB16

Note: Tommy bars are not included. Hi-Force recommends one tommy bar for every four tensioners. Please note that the tommy bar listed will fit related quick fit puller; a different size may be required for the drilled hexagon nut.

Dimension

Hi force dim draw bolt tensioners STU

Dimensions (mm)

Model Number
ABCDEF
STU1-100822211911914061
STU1-112822211911914064
STU2-1251023014014016473
STU2-1371023014014016475
STU3-1501143514214216982
STU3-1621143514214216985
STU4-1751284115115118194
STU4-1871284115115118198
STU5-20015048164164202112
STU5-22515048164164202116
STU6-25017660183183231136
STU6-27517660183183231141
STU7-30021589215215260162
STU7-32521589215215260173
STU7-35021589215215260175

Services and support

Whether it is choosing the right tool for the job, improving technical and operational knowledge or product maintenance and warranty, HES is here to help.

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