Featuring a particularly high safety reserve and, the hydraulic cylinder clamping rod lock unit certified by DGUV Test are approved for the use in hydraulic presses according to EN ISO 16092-1/-3, and in plastic injection moulding machines according to EN ISO 20430. They meet all requirements of the DGUV Test, the testing and certification authority for safety cylinder rod lock, lifting gear, safety components and machinery.
The clamping unit is a reliable technological rod lock 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.
As a safety element, the clamping unit is used as follows:
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.
RATIO-CLAMP® |
RATIO-CLAMP® AS SAFETY COMPONENT |
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+ Releasing pressure + Locking + Sealing system + Certification |
Basic design With spring power Servocop® TÜV |
Basic design With spring power Servocop® TÜV, DGUV Test |
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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) |
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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.