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
The mounting and dismounting of gas springs, tension springs
and dampers must be carried out according to safety rules.
When mounting/ storing
gas springs: piston rod must point downwards
dampers: piston rod must point downwards
tension springs: piston rod must
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.
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
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.
Make allowance for play in the joints, if there are vibrations the fittings need
fastened against loosening.
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
Even minor damage, corrosion or paint residues on the piston rod may result in
failure of the unit (damage of seal). The cylinder must not be damaged
Any change of the product through third parties will expire
any warranty /guaranty.
Gas springs must not be loaded with traction forces, tension springs not with
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.
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.
Use the product only within a temperature range of -20° to +80° C., if used in
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.
recharge the springs you need a written approval from us.
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
be mounted with the piston rod upwards. The springs may not
be used in closed applications where there is condensation due to temperature
A locking gas spring's piston rod is in fact a tube in which a plunger is fitted.
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
Danger of bending and tilting of locking springs in extended position.
We cannot guarantee application proposals or drawings since there may be parameters
not indicated and therefore not taken into account on the inquiry.
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.
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
to case. High acceleration or velocities during extending or compressing
must not lead
to overloading the product's.
. 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.
Maximum pressure 160 bar (at 20° C)
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
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.
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.
/ guaranty applies only if our instructions are followed.