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. Components and Function
. Order Example
. Gas Springs
. Locking Springs
. Tension Springs
. Dampers
. Special Locking Springs
. Extras
. Brackets
. Special Fittings
. Usage Instructions
. Applications

 

Usage Instruction and Product Indemnification
Please read all instructions before designing, installing or storing!

1. If gas springs, tension springs or dampers are fitted in applications where their failing would mean a risk of health or life, additional locking mechanisms must be employed.
The mounting and dismounting of gas springs, tension springs and dampers must be carried out according to safety rules.

2. When mounting/ storing
gas springs: piston rod must point downwards
dampers: piston rod must point downwards
tension springs: piston rod must point upwards
A loss of pressure due to long storage is not to be expected, but we do recommend not
to store the products longer than 1 year. There may be a sticking effect (slip stick) when
the spring is operated the first time after a long rest. Therefore the force for retraction or compression will be higher than the given nominal force. Before installing the springs
the plastic sleeves are to be removed.

3. Gas springs, tension springs, and dampers are not safety parts! Gas springs, tension springs, and dampers wear out after a certain period of time. Corrosion must be avoided
to achieve higher life expectancy and fatigue strength. Minor quantities of hydraulic fluid may leak from the products. These must not get in contact with food or similar goods or subsoil water.

4. Make allowance for play in the joints, if there are vibrations the fittings need to be
fastened against loosening.

5. Avoid tilting of piston rod. Long strokes need additional guidance or particular
bearings to avoid bending and tilting of the product, non-axial forces must be avoided.

6. Even minor damage, corrosion or paint residues on the piston rod may result in a
failure of the unit (damage of seal). The cylinder must not be damaged or deformed.
Any change of the product through third parties will expire any warranty /guaranty.

7. Gas springs must not be loaded with traction forces, tension springs not with compressive forces.

8. None of the gas springs, tension springs, and dampers must be extended or
retracted over their respective limit stops in both the closed and open position.

9. Tension springs and gas springs may be used as a limit stop. However, the tension
or compression load must not exceed the nominal force + 30 %. Torsion or transverse forces must be avoided. Where possible, physical stops should be employed, limiting
the extended and compressed lengths of the products to within 5mm of their maximum closed and open lengths.

10. Use the product only within a temperature range of -20 to +80 C., if used in the
former - or even lower temperatures - please inform us in any case. Do not heat up
over 80 C.
Temperature variances affect the extension and compression force (approx. 3 % of
nom force by a change of 10 C). The oil's viscosity also changes.
To avoid non-usability this must be taken into account.

11. To recharge the springs you need a written approval from us.

12. Tension springs are open systems. It must be avoided, that dirt or other mediums
may enter the spring through the hole in the cylinder base plate. Tension springs should
be mounted with the piston rod upwards. The springs may not be used in closed applications where there is condensation due to temperature changes.

13. A locking gas spring's piston rod is in fact a tube in which a plunger is fitted. Should
dirt or detergents get into the piston rod's inside this may cause corrosion which then
leads to the plunger sticking fast. Preferably locking springs should be mounted with the piston rod downwards. If locking springs are installed in places where they may get into contact with detergents (hospital beds), this must be indicated in your order. Max. number
of release operations = approx. 30000. Locking forces are specified in compressed
position. Caution: Danger of bending and tilting of locking springs in extended position.

14. We cannot guarantee application proposals or drawings since there may be parameters not indicated and therefore not taken into account on the inquiry.
Hence caution must be applied when mounting the gas springs. Generally the order
must indicate whether the springs are used in "normal" conditions (20 C, natural environment = air) or whether other mediums (water steam > 80 C, chemicals,
detergents, etc.) are involved.

15. The application and employment of gas springs, tension springs and dampers
ought to be tested by the user because the varying employment situations of our
products cannot be simulated by us and the products behavior may differ from case
to case. High acceleration or velocities during extending or compressing must not lead
to overloading the product's.

Tolerances/ characteristics/ disposal

1 . Length tolerance on the products is +/- 2 mm, force tolerance between 3N 5 % of the nominal force and 10 % of the nominal force (depending on the nominal force). (Exact tolerances are given in our force measuring instructions. Force for releasing locking gas springs = 18 % of nominal force of the spring.

2. Maximum pressure 160 bar (at 20 C)

3. Maximum speed of the piston is approx. 300 mm/s. Fast operation rates will lead to excessive heat buildup with subsequent internal seal damage. High acceleration or velocities during extending or compressing must not lead to overloading the products.

4. Life expectancy: gas springs, dampers (10,000 cycles), tension springs (2,000 cycles) locking springs (4,000 cycles), if used in indoor, non-corrosive conditions.

5. Gas springs, tension springs, and dampers are under pressure and filled with oil. Do not heat over 800 C. Do not open the cylinders! Dispose of only in accordance with local Hazmat laws.

Warranty / guaranty applies only if our instructions are followed.