Our dampers differ in pipe diameter, piston rod diameter, force classes and in different designs:
| Designation | Diameter of the tube | Diameter of a piston rod | Force classes |
|---|---|---|---|
| HD 12 | 12 mm | 4 mm | 50 - 400 N |
| HD 13 | 13 mm | 5 mm | 50 - 400 N |
| HD 15 | 15 mm | 6 mm | 50 - 500 N |
| HD 18 | 18 mm | 8 mm | 0 - 2,000 N |
| HD 22 | 22 mm | 10 mm | 50 - 2,500 N |
| HD 25 (standard) | 25 mm | 8 mm | 100 - 5,000 N |
| HD 34 | 34 mm | 8 mm | 100 - 5,000 N |
| HD 38 | 38 mm | 10 mm | 100 - 6,000 N |
These sizes are also available by request with a path-dependent damping. The path-dependent damping is the change across the path at constant speed. It should be noted that the force classes (damping forces) may change at higher test speeds.
The sizes named in the table above are available with the following models depending on the application:
| Type | Idle stroke | Positional independence | Extension force | Adjustability |
|---|---|---|---|---|
| Standard damper | Yes | No | No | No |
| With gas pressure (GD) | No | No | Yes | No |
| With gas pressure and separating piston (GDTK) | No | Yes | Yes | No |
| With bottom valve (BV) | No | No | No | No |
| With bottom valve and membrane (BVM) | No | Yes | No | No |
| 2-tube damper | No | No | No | Yes |
| Damper types | Standard | GD | GDTK | BV | BVM | 2-pipe |
|---|---|---|---|---|---|---|
| HD 12 | x | x | ||||
| HD 15 | x | x | ||||
| HD 18 | x | x | ||||
| HD 22 | x | x | ||||
| HD 25 | x | x | x | x | ||
| HD 34 | x | |||||
| HD 38 | x |
The standard damper is suitable for versatile applications. A compensation chamber remains in the pressure pipe for the retracting piston rod. An idle stroke may result here depending on the installation position.
The damper with gas pressure corresponds to the standard damper, but with extension force.
For dampers with gas pressure and separating pistons, oil and gas is separated by the separating piston so that the damper can be installed in any position without having an idle stroke.
With this type of damper, the bottom valve separates the oil from the compensation chamber. The damper has no extension force and has to be installed with the piston rod facing down.
The membrane in the compensation chamber behind the bottom valve expands when loaded (pressure) or contracts (tension). The damper thus works without extension force in any installation position.
The 2-tube dampers consist of an inner and outer tube, whereby the inner tube forms the working space. The space between the two tubes accommodates the oil displaced by the retracting piston rod. The damping force spring of the 2-tube dampers can be variably adjusted due to the internal structure. The weight is also reduced to a minimum due to the use of an aluminum outer tube.
