Hydraulic dampers Softline

SUSPA hydraulic dampers are application linked. We do not sell those products on this website, but you can still use the Contact Form if you need any information

The SUSPA hydraulic dampers, also called shock absorbers, industrial shock absorbers or vibration dampers, are designed for the respective product application so that an optimal movement sequence or optimal vibration behavior is achieved. We use our decades of experience in the field of damping technology to solve your individual requirements for damping vibrations and impacts.

What is a hydraulic damper

Hydraulic dampers are damping elements that convert the kinetic energy of moving parts into thermal energy. This avoids hard impacts or excessive vibration amplitudes.

Structure of a hydraulic damper

Hydraulic dampers consist of a pressure pipe, a piston rod with a special piston system and the damping medium of oil, which is why they are also called hydraulic dampers. Within the oil-filled pressure pipe is the piston rod with the special sealing and guiding package, which hermetically seals the interior of the hydraulic damper to the atmosphere - even under extreme environmental influences.

Damping forces

When the piston rod is moved, the damping medium of oil is pressed through the bores in the piston system. The damping force results from the resistance of the oil when flowing through the piston system. Due to the internal design of the piston system, the pull and push direction can be set independently of each other. The damping forces are dependent on the piston speed.

Characteristic Curve of the Hydraulic Damper

Adjustable linear, progressive or degressive characteristic curves allow for the application-oriented design of the hydraulic damper. All hydraulic dampers developed by SUSPA are designed for the respective product application so that an optimal movement sequence or optimal vibration behavior is achieved.

Shock absorbers and vibration dampers

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

Selection matrix

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

Standard damper

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.

Characteristics

Without extension force F1
With idle stroke
Positionally-dependent

Application Examples

Waste containers
Shop counter
Medical applications
Furniture flaps
Commercial vehicle interior
Overhead compartment
Seats for commercial vehicles

Dampers with gas pressure (GD)

The damper with gas pressure corresponds to the standard damper, but with extension force.

Characteristics

With extension force F1
With idle stroke
Positionally-dependent

Application Examples

Industrial applications
Seats for commercial vehicles

Dampers with gas pressure and separating piston (GDTK)

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.

Characteristics

With extension force F1
With idle stroke
Positionally independent

Application Examples

Waste containers
Overrun brakes
Industrial applications
Commercial vehicle interior
Seats for commercial vehicles

Dampers with bottom valve (BV)

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.

Characteristics

Without extension force F1
Without idle stroke
Positionally dependent

Application Examples

Shop counter
Commercial vehicle interior
Engine vibration damper
Belt tensioner
Seats for commercial vehicles

Dampers with bottom valve and membrane (BVM)

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.

Characteristics

without extension force F1
without idle stroke
Positionally independent (installation of the piston in any position)

Application Examples

Overrun brakes
Commercial vehicle seats
Belt tensioner
Universally applicable

2-tube damper

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.

Characteristics

Model HD34: Ø Outer tube 34 mm oval (not adjustable)
Model HD38: Ø Outer tube 38 mm round (adjustable)
Ø Piston rod 10 mm
Damping force max. 6,000 N
Without extension force F1
Without idle stroke
Positionally dependent (installation of the piston rod on top)

Application Examples

Commercial vehicle seats (vertical damping)