Daiwa Kenko, Jack, Japan, Lifting
Daiwa Kenko DN Type Preload Jack (Double Acting Type)
Manufacturer: Daiwa Kenko
Model: DN30; DN40; DN50
This DN type of preload jack has a return function, has large oil pressure, and therefore has a wide range of use.
It is used for many purposes such as preloading, refilling of girders, underpinning, bulking and relocation of bridges and building structures, and loading tests.
The axial force of the girder can be measured by attaching an axial force measuring device (PGB).
Specification
| Model No | DN30 | DN40 | DN50 | |
|---|---|---|---|---|
| Applicable beam size | H300 | H350 | H400 / H500 | |
| Plate hole dimensions A x B | mm | 200 x 200 | 250 x 250 290 x 290 | 290 x 290 |
| Oil pressure | KN (tf) | Push 1,000 (100) | Push 2,000 (200) | Push 3,000 (300) |
| KN (tf) | Return 50 (5) | Return 50 (5) | Return 50 (5) | |
| Screw yield strength | KN | 2,500 | 3,500 | 4,500 |
| tf | 250 | 350 | 450 | |
| Stroke: S | mm | 150 | 150 | 150 |
| Machine height: C (no adjustment material) | mm | 485 | 485 | 485 |
| Weight (without adjustment material) | ㎏ | 180 | 290 | 400 |
| Weight (with adjustment material) | ㎏ | 240 | 374 | 510/660 |
| Pressure receiving area | ㎠ | 132.67 | 268.67 | 415.27 |
| Axial force measurement | KN | 1,000 | 2,000 | 3,000 |
| tf | 100 | 200 | 300 | |
| The maximum amount of oil | L | 2 | 4.1 | 6.3 |
| Dimension | ||||
Combination example
Strength test
Adjusting Material
Handling instructions
PGB pressurization by manual pump DPC-DN (video)
Pressurization procedure by manual pump DPC-DN (video)
Decompression procedure using manual pump DPC-DN (video)
Instructions for vertical use
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