This distinguishes the hydaulic clamping device:
  • is activated in case of a power failure
  • approved by DGUV Test
  • no damage to the clamping device
  • no damage to the clamped rod

Installation instructions for hydraulic clamping devices for personal security

Federal German law (BG) requires that the user ensures that the Ratio-Clamp® RCH hydraulic rod clamp model is installed in compliance with the requirements DIN EN 693 or DIN EN 201. Control technology measures are taken, which will prevent the hydraulic clamping device from releasing prematurely (before the load is supported on the pressure column) and which implement a solution through which the holding force can be inspected when in installed status. This is the somewhat down-to-earth requirement.

Next to the providing the user with the catalogue range of products we at Hänchen are only too glad to offer our know how and experience with regard to hydraulic clamping devices in their planning and configuration.
Federal German law (BG) requires that the user ensures that the Ratio-Clamp® RCH rod clamping device model is installed in compliance with the requirements DIN EN 693 or DIN EN 201 and that control technology measures are taken, which will prevent the clamping unit from releasing prematurely (before the load is supported on the pressure column) and which implement a solution through which the holding force can be inspected when in installed status.

Use as a safety element

The clamping unit is a reliable technological solution if hazards due to external forces or loads must be taken into account in accordance with EN ISO 13849-1. In case of fluctuations or loss of the pressure energy, the clamping unit immobilises round rods under an axial load.

For more information about the functional principle, please refer to clamping device basics.

 

DGUV Test-certified clamping device

As a safety element, the clamping device is used as follows:

  • As a secure position retention element in case of a line break
  • As a locking element if cylinders or valves have internal leakages, e.g. through gap seals
  • As an additional safety component for axes strained by gravity, if the load causes hazards, e.g. in hold-up devices when lowering a load associated with hazards

 
The clamping unit, with its frictional contact function, is permitted as a redundant safety component in accordance with EN ISO 13849-2. For example, a non-return valve can be used as a primary safety element.

To use the clamping unit as a safety component, you can request the B10D value from us to determine your performance level

Technical data of hydraulic clamping device

  • for all round rods with hard surfaces
  • load capacity independent of direction
  • after 1 million switching cycles the Ratio-Clamp® shall be inspected at the factory
  • max. rod speed: 1 m/s with Servocop®, 2 m/s with pressure piston seal
  • max. releasing pressure: 160 bar
  • working temperatures: -30°C bis +80°C
  • fluids: mineral oils, others like water, HFC or Skydrol® on request
Technical data
Clamping unit
Here you can find all technical data for our clamping unit Ratio-Clamp® on an overview sheet
    RATIO-CLAMP®

RATIO-CLAMP®
AS SAFETY COMPONENT
 
  + Releasing pressure
+ Locking
+ Sealing system
+ Certification
Basic design
With spring power
Servocop®
TÜV
Basic design
With spring power
Servocop®
TÜV, DGUV Test
 
  Rod Ø
(mm)
Max.
holding load
(kN)
Releasing pressure
min.
(bar)
Max.
holding load
(kN)
Permissible load
according to
DGUV Test (kN)
Releasing pressure
min.
(bar)
 
   16  10     60           
   18  12,5  55    12,5 6,25 55     
   20  14     55     14    7         55     
   22  17     70     17    8,5    70     
   25  20     70     20    10       70     
   28  31,5  90     31,5 15,75   90     
   30  40     105     40    20       105     
   32  40     60     40    20      60     
   36  45     75    45    22,5    75     
   40  50     80     50    25       80     
   45  65     70     65    32,5    70     
   50  80     90     80    40        90     
   56  90     75     90    45        75     
   60  100     75     100    50        75     
   63  100     85     100    50       85     
   70  140     80     140    70         80     
   80  180     90     180    90       90     
   90  200     65    200    100       65     
   100  250     75     250    125        75     
   110  300     65     300    150        65     
   120  330     70     330    165       70     
   125  350     75     350    175       75     
   140  450     65    450    225       65     
   160  750     90           

 

Other holding forces and rod Ø on request.
Hydraulic locking is possible up to 2,000 kN holding load and 300 mm rod Ø.
The stated values apply to operation with mineral oil. The holding load may differ when using other fluids.

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