Häko Product configurator
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

Potential dangers from external forces or loads must be taken into consideration if machines are subject to a risk assessment according to DIN EN ISO 13849-1. These dangers must be prevented from causing a hazardous movement of the cylinder. The clamping device Ratio-Clamp® ensures the safety of people, machines and tools in the event of a power failure or system shutdown.

 

In case of fluctuations, loss or return of pressure energy, the safety clamping device triggers and locks the round rods under an axial load for an indefinite time, without pressure and reliably. For more information about the functional principle, please refer to clamping device basics.
As a safety element, the clamping device is used as follows:

  • As a substitute for non-return valves if risks occur due to external force in de-energised state.
  • As additional safety element for drives strained by gravity, if the load causes hazards, e.g. in restraining devices when lowering a load associated with hazards.
  • As a fixing element if the cylinder has internal leaks, e.g. over the piston seal or over gap seals.
  • As a secure position retention element in case of line break.

 

DGUV Test-certified clamping device

Technical data of hydraulic clamping device

 Clamping device Ratio-Clamp®
with DGUV Test certification

Sealing system
Releasing pressure
Certification
Functional principle
Servocop®
Basic design
DGUV Test
Locked with spring power
Rod Ø f7
in [mm]
F axial max.
in [kN]
p release min
in [bar]
18 6.25 55
20 7 55
22 8.5 70
25 10 70
28 15.75 90
30 20 105
32 20 60
36 22.5 75
40 25 80
45 32.5 70
50 40 90
56 45 75
60 50 75
63 50 85
70 70 80
80 90 90
90 100 65
100 125 75
110 150 65
120 165 70
125 175 75
140 225 65

 

  • for all round rods with hard surfaces
  • load capacity independent of direction
  • after 2 m switchings, the hydraulic cylinder rod lock must be checked by the manufacturer
  • max. rod speed: 1 m/s for Servocop®, 2 m/s for pressure piston seal
  • max. releasing pressure: 160 bar
  • operating temperature: -30°C bis +80°C
  • liquids: mineral oils
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