STU Range - Imperial
Sub-Sea Bolt Tensioners - Imperial
- 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
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 1" to 3½” diameter
- Working pressure 1500 bar
Product resources
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Technical specifications
| Model Number | Quick fit puller | Bolt Thread Size | Capacity | Effective area cm2 | Stroke mm | Weight kg | Tommy Bar | |
|---|---|---|---|---|---|---|---|---|
| kN | tonnes | |||||||
| STU1-100 | QFP1-100 | 1" - 8UN | 256 | 26.1 | 17.1 | 20 | 3.4 | TTB06 |
| STU1-112 | QFP1-112 | 1 1/8"- 8UN | 256 | 26.1 | 17.1 | 20 | 3.4 | TTB06 |
| STU2-125 | QFP2-125 | 1 1/4"- 8UN | 430 | 43.9 | 28.7 | 30 | 6.0 | TTB08 |
| STU2-137 | QFP2-137 | 1 3/8"- 8UN | 430 | 43.9 | 28.7 | 30 | 6.0 | TTB08 |
| STU3-150 | QFP3-150 | 1 1/2"- 8UN | 553 | 56.4 | 36.9 | 30 | 7.5 | TTB10 |
| STU3-162 | QFP3-162 | 1 5/8"- 8UN | 553 | 56.4 | 36.9 | 30 | 7.5 | TTB10 |
| STU4-175 | QFP4-175 | 1 3/4"- 8UN | 756 | 77.1 | 50.4 | 30 | 9.8 | TTB10 |
| STU4-187 | QFP4-187 | 1 7/8"- 8UN | 756 | 77.1 | 50.4 | 30 | 9.8 | TTB10 |
| STU5-200 | QFP5-200 | 2" - 8UN | 1168 | 119.1 | 77.9 | 30 | 14.5 | TTB12 |
| STU5-225 | QFP5-225 | 2 1/4" - 8UN | 1168 | 119.1 | 77.9 | 30 | 14.5 | TTB12 |
| STU6-250 | QFP6-250 | 2 1/2" - 8UN | 1649 | 168.1 | 109.9 | 30 | 22.8 | TTB14 |
| STU6-275 | QFP6-275 | 2 3/4" - 8UN | 1649 | 168.1 | 109.9 | 30 | 22.8 | TTB14 |
| STU7-300 | QFP7-300 | 3" - 8UN | 2483 | 253.2 | 165.6 | 30 | 35.6 | TTB16 |
| STU7-325 | QFP7-325 | 3 1/4" - 8UN | 2483 | 253.2 | 165.6 | 30 | 35.6 | TTB16 |
| STU7-350 | QFP7-350 | 3 1/2" - 8UN | 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 quickfit puller; a different size may be required for the hexagon nut.
Dimension
Dimensions (mm)
| Model Number | ||||||
|---|---|---|---|---|---|---|
| A | B | C | D | E | F | |
| STU1-100 | 82 | 22 | 119 | 119 | 140 | 61 |
| STU1-112 | 82 | 22 | 119 | 119 | 140 | 64 |
| STU2-125 | 102 | 30 | 140 | 140 | 164 | 73 |
| STU2-137 | 102 | 30 | 140 | 140 | 164 | 75 |
| STU3-150 | 114 | 35 | 142 | 142 | 169 | 82 |
| STU3-162 | 114 | 35 | 142 | 142 | 169 | 85 |
| STU4-175 | 128 | 41 | 151 | 151 | 181 | 94 |
| STU4-187 | 128 | 41 | 151 | 151 | 181 | 98 |
| STU5-200 | 150 | 48 | 164 | 164 | 202 | 112 |
| STU5-225 | 150 | 48 | 164 | 164 | 202 | 116 |
| STU6-250 | 176 | 60 | 183 | 183 | 231 | 136 |
| STU6-275 | 176 | 60 | 183 | 183 | 231 | 141 |
| STU7-300 | 215 | 89 | 215 | 215 | 260 | 162 |
| STU7-325 | 215 | 89 | 215 | 215 | 260 | 173 |
| STU7-350 | 215 | 89 | 215 | 215 | 260 | 175 |
Services and support
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