Description
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. All hydraulic load cells are suitable for different thread sizes and interchangeable quick fit/release pullers can be ordered separately, as required, resulting in even greater flexibility and cost savings.
- Capacities from 256 to 2482 kN
- Bolt sizes M24 to M90 diameter
- Working pressure 1500 bar
- 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
- Dual quick connect couplings for easy connection
- Designed to fit most sizes of ANSI and API flanges and some Compact flanges
- Interchangeable quick fit pullers to cover secondary bolt sizes for each STU model
- Customised and special design tensioners are available on request
| Model Number |
Quick fit puller |
Bolt Thread Size |
Capacity |
Effective area cm2 |
Stroke mm |
Weight kg |
Tommy Bar |
| kN |
tonnes |
| STU1-24 |
QFP1-24 |
M24 x 3 |
256 |
26.1 |
17.1 |
20 |
3.4 |
TTB06 |
| STU1-27 |
QFP1-27 |
M27 x 3 |
256 |
26.1 |
17.1 |
20 |
3.4 |
TTB06 |
| STU2-30 |
QFP2-30 |
M30 x 3.5 |
430 |
43.9 |
28.7 |
30 |
6.0 |
TTB08 |
| STU2-33 |
QFP2-33 |
M33 x 3.5 |
430 |
43.9 |
28.7 |
30 |
6.0 |
TTB08 |
| STU2-36 |
QFP2-36 |
M36 x 4 |
430 |
43.9 |
28.7 |
30 |
6.0 |
TTB10 |
| STU3-39 |
QFP3-39 |
M39 x 4 |
553 |
50.4 |
36.89 |
30 |
7.5 |
TTB10 |
| STU3-42 |
QFP3-42 |
M42 x 4.5 |
553 |
50.4 |
36.89 |
30 |
7.5 |
TTB10 |
| STU4-45 |
QFP4-45 |
M45 x 4.5 |
756 |
77.1 |
50.4 |
30 |
9.8 |
TTB10 |
| STU4-48 |
QFP4-48 |
M48 x 5 |
7560 |
77.1 |
50.4 |
30 |
9.8 |
TTB12 |
| STU5-52 |
QFP5-52 |
M52 x 5 |
1168 |
119.1 |
77.9 |
30 |
14.5 |
TTB12 |
| STU5-56 |
QFP5-56 |
M56 x 5.5 |
1168 |
119.1 |
77.9 |
30 |
14.5 |
TTB14 |
| STU6-60 |
QFP6-60 |
M60 x 5.5 |
1649 |
168.1 |
109.9 |
30 |
22.8 |
TTB14 |
| STU6-64 |
QFP6-64 |
M64 x 6 |
1649 |
168.1 |
109.9 |
30 |
22.8 |
TTB16 |
| STU6-68 |
QFP6-68 |
M68 x 6 |
1649 |
168.1 |
109.9 |
30 |
22.8 |
TTB16 |
| STU6-72 |
QFP6-72 |
M72 x 6 |
1649 |
168.1 |
109.9 |
30 |
22.8 |
TTB16 |
| STU7-76 |
QFP7-76 |
M76 x 6 |
2483 |
253.2 |
165.6 |
30 |
35.6 |
TTB16 |
| STU7-80 |
QFP7-80 |
M80 x 6 |
2483 |
253.2 |
165.6 |
30 |
35.6 |
TTB16 |
| STU7-85 |
QFP7-85 |
M85 x 6 |
2483 |
253.2 |
165.6 |
30 |
35.6 |
TTB16 |
| STU7-90 |
QFP7-90 |
M90 x 6 |
2483 |
253.2 |
165.6 |
30 |
35.6 |
TTB16 |
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.
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