Strand Lifting Technology - PAUL Maschinenfabrik GmbH & Co. KG

Maschinenfabrik GmbH & Co. KG
Strand Lifting
Technology
made
in
Germany

2
A 800kN strand jack series with
hydraulic anchor heads

Maschinenfabrik GmbH & Co. KG
Maschi
chinen
nenfab
fabrik
GmbH
&Co.
KG
The companies DaSTec and PAUL are cooperation partners
in the field of lifting technology. They collaborate in the
supply of system solutions and proven, top-quality products
for lifting, lowering and pulling heavy loads.
DaStec develops the application solution.
PAUL supplies the equipment.
Since 1955, PAUL has developed and built stressing jacks and
hydraulic pump units for the manufacture of prestressed
concrete products, and since 1986 has also supplied a series
of strand jacks with mechanical anchor heads. The company‘s
many years of experience in these fields and DaSTec‘s
hands-on practical expertise have been channelled into the
development of new, efficient and durable products for
strand lifting applications.
A new series of lifting cylinders with hydraulic anchor heads
now permits the automatic movement of loads, supplementing
the existing product spectrum.
Our plant in Dürmentingen provides production space of 37,000 square metres,
and accommodates the assembly, design and sales departments as well as a
trainee workshop. The complete PAUL site covers an area of more than 120,000
square metres.
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PDM/PDH STRAND JACKS
A strand jack essentially comprises the lifting cylinder and
two anchor heads (top anchor and bottom anchor). The
strand cable is moved upwards or downwards by alternately
opening and closing of the top and bottom anchor during
the lifting stroke of the hollow piston. This creates the
load (G) lifting or lowering movement.
Lifting cylinder
Hollow piston
Jack support chair
Wedge plates of
the top and bottom
anchor head
Anchor wedges of
the top and bottom
anchor head
Strand with
load (G)
Our strand jacks are designed for strands with a diameter
of 15.7 mm. An admissible force of 120 kN is allowed per
strand.
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We offer strand jacks with a nominal load of 200 to 6,400 kN
and a lifting stroke of 500 mm. The series is designed to allow
strand jacks for different rated loads to be easily combined.

Maschinenfabrik GmbH & Co. KG
Maschi
chinen
nenfab
fabrik
GmbH
&Co.
KG
Strand jacks with mechanical anchor heads (series PDM) are
available for rated loads of up to 1,600 kN, and with hydraulic
anchor heads (series PDH) for rated loads of up to
6,400 kN.
PDM-020
PDH-020
PDM-040
PDH-040
PDM-080
PDH-080
PDM-160
PDH-160
PDH-320
PDH-640
Rated load [kN] 200 400 800 1600 3200 6400
Piston area [cm²] 64 128 256 512 1024 2048
Retraction area [cm²] 50 100 200 400 800 1600
Pressure [bar] 315 315 315 315 315 315
Cylinder force [kN] 202 403 806 1613 3226 6451
Number of strands 2 4 7 15 31 61
Admissible strand force [kN] 240 480 840 1800 3720 7 320
Optimum strand guidance is guaranteed by hardened guide
plates at the anchor heads and suspension. Telescopic strand
guide tubes perform this function inside the hollow piston.
The basic equipment of the strand jack includes the following
components:
• Load holding valve
• Connection for second strand jack
• 2 electrical pressure sensors to measure pressure on the
piston and retraction side
• Linear potentiometer for piston stroke
• One linear potentiometer each for the wedge-seating
stroke of the anchor heads (series PDH)
The hydraulic anchor heads open and close
the anchor wedges (by pressing them into the
wedge plate). This is particularly beneficial
for pulling operations in horizontal use.
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PDP HYDRAULIC PUMP UNITS
Every strand jack is supplied
by a hydraulic pump unit.
This allows hydraulic line
lengths to be kept to a minimum.
There are three different
units using pumps with
different delivery capacities.
The pumps also supply the
hydraulic anchor heads.
PDP-08
PDP-16
PDP-32
Flow rate, lifting cylinder [l/min.] 8 16 32
Lifting cylinder pressure [bar] 315 315 315
Flow rate, anchor assemblies [l/min.] 3 3 3
Pressure, anchor assemblies [bar] 150 150 150
Motor output, pump [kW] 5.5 11 22
Connected loads, three phase current [V]
(without neutral conductor) [Hz]
400
50
400
50
400
50
Oil tank [l] 100 100 200
Lifting speed
[m/h]
with strand jack PD-020
with strand jack PD-040
with strand jack PD-080
with strand jack PD-160
with strand jack PD-320
with strand jack PD-640
(recommended application range in bold)
75.0
37.5
18.8
9.4
4.7
2.3
150.0
75.0
37.5
18.8
9.4
4.7
300.0
150.0
75.5
37.5
18.8
9.4
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Maschinenfabrik GmbH & Co. KG
Maschi
chinen
nenfab
fabrik
GmbH
&Co.
KG
Standard equipment:
• Return-flow filter with clogged filter indicator light at
the control system
• Oil level display at the oil tank (filling quantity and
temperature)
• Electrical cabinet with interface for the bus system and
connection with manual control system
Optional equipment:
• Electrical oil level display
• Electrical oil temperature display
• Oil tank heating
• Oil tank cooling
• Frequency converter for stepless flow rate
As the standard configuration for an equipment
outfit, we recommend the following items:
• 4 strand jacks
• 4 transport cases
• 4 hydraulic pump units
• 4 fixed anchors
• 1 control system
• 1 bus cable (data cable)
• 4 sets of hoses 5 m (optionally 10 m) with data
and control cable for strand jack
• 4 strand guides
• 1 uncoiling reel for strands
The configuration is adjusted individually to customer
requirements. The control system and accessories
are described on the following pages.
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CONTROL SYSTEM
Operation of the strand jacks takes place centrally with the
aid of a user-friendly control system. It visualizes up to 16
strand jacks on a display, so guaranteeing full control of the
hydraulic pressure, piston stroke and anchor assembly status
(open/closed). If required, the display can be supplemented
by additional strand jacks. The central control system is connected
by means of a bus cable to the individual hydraulic
pump units and processes signals in real time.
Typ PDH-080 PDH-080 PDH-080 PDH-040 PDH-040 --- --- ---
Stroke [mm] 40 38 41 39 40 --- --- ---
Load [kN] 642 618 712 283 292 --- --- ---
Lift [mm] 20 18 21 19 20 --- --- ---
Total [mm] 15 15 15 15 15 --- --- ---
Lift 250 252 249 251 252
Typ --- --- --- --- --- --- --- ---
Stroke [mm] --- --- --- --- --- --- --- ---
Load [kN] --- --- --- --- --- --- --- ---
Lift [mm] --- --- --- --- --- --- --- ---
Total [mm] --- --- --- --- --- --- --- ---
Lift START
MENUE
Total Load [kN]
2547
The following operating modes are supported by the control
system:
• Set-up mode and pre-load stroke
• Automatic lifting and lowering mode
• Manual mode for corrections
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The control system monitors the lifting or lowering mode. It
is possible to select between pressure and path monitoring.
If the prescribed limiting values are exceeded, the operator
is warned and, if necessary, the current process is stopped
in order to carry out the necessary corrections. In the automatic
mode, the control system regulates the stroke
and pressure automatically.

Maschinenfabrik GmbH & Co. KG
Maschi
chinen
nenfab
fabrik
GmbH
&Co.
KG
ACCESSORIES
We supply a series of accessories in order to simplify handling
of the lifting equipment and the strands:
• Transport cases
• Strand guides
• Hose packages
• Uncoiling reels for strands
• Strand dispensers
• Anchors for fixed side
• and many more
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APPLICATION FIELDS
Kwang Yang Bridge, South Korea, 2009/2010
[Source: Gleitbau Salzburg]
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Salzburg Airport, Austria, 2012
[Source: Gleitbau Salzburg]

Maschinenfabrik GmbH & Co. KG
Maschi
chinen
nenfab
fabrik
GmbH
&Co.
KG
Bridge Selo, Croatia, 1997
[Source: Citra, France]
Steel platforms in Jeddah, Saudi Arabia, 2007
[Source: Gleitbau Salzburg]
Heavy Lifting, Czech Republic, 1995 [Source: Frutiger, Switzerland]
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Maschinenfabrik GmbH & Co. KG
Max-Paul-Straße 1
88525 Dürmentingen
Germany
Phone: +49 (0) 7371 / 500 - 0
Fax : +49 (0) 7371 / 500 - 111
E-Mail: spannbeton@paul.eu
Internet: dastec.paul.eu
Riefershäusern 31
3415 Hasle bei Burgdorf
Switzerland
Phone: +41 (0) 34 / 445 68 63
E-Mail: info@dastec.ch
Internet: www.dastec.ch
PAUL-Info B 143.81/1 Error and modification reserved.
1303
en