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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 PDF PDF PDF

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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