Gate gas springs
Please read this paragraph first before looking at the brochures
Fully damped in extension, IGS standard
gate gas springs/gas struts are a suitable alternative to standard gate closers
and allow a much greater choice of mounting positions. These gas
springs are using IGS standard design for outdoors gas springs and
have been specifically designed to withstand over 100,000 cycles outdoors or indoors.
These gas springs are heavily damped in extension, ensuring that the closing
movement of the gate is slow and cannot hurt or injure
the person standing next to it (gas spring's force may need to be
adjusted to obtain optimal speed/force).
Please note that whilst there is no damping in compression, gate gas springs are self-powered and are producing a high force regardless of the direction of the movement, please check this page for further information.
When you try to close a gate with your hand, you need to exert a force on the gate. This force (in Newtons) times the distance between your hand and the hinge (in metres) gives you the "manual closing torque" required to close the gate.
If you want the gate gas spring to close this same gate, then you need to make sure that the "gate gas spring torque" is higher than the "manual closing torque" (in NewtonxMetre).
Typically, gate gas springs can produce the following torques:
150mm stroke gas spring fitted 45deg, 100mm away from the pivot point
with 100 Newton --> 7 N.m
with 500 Newton --> 35 N.m
For a 250mm stroke gas spring fitted 45 deg, 165mm away from the pivot point:
with 100 Newton --> 12 N.m
with 300 Newton --> 36 N.m
Always chose a gate gas spring type, force and mounting position so the "gate gas spring torque" is giving at least 7 to 12 N.m more than the maximum "manual closing torque" you calculated.
For example, if you need to exert a manual force of 10 Newton at the end of a 2m long gate in order to close it, this means you are in fact exerting a "manual closing torque" of 10N x 2m = 20 N.m and you should choose a gas spring and mounting position which will give you more than 30 N.m.
Now, which one should you choose, 150mm or 250mm stroke ?
Choose the 150mm stroke gas spring if you can mount this gas spring at less than 100mm from the pivot point of the gate (see page 3 of datasheet).
With a difference of 7 N.m, this gas spring will close a gate in about 5 to 6 seconds.
Choose the 250mm stroke gas spring if you can mount it between 120mm and 165mm from the pivot point of the gate (see page 3 of datasheet). With a difference of 12 N.m, this gas spring will close a gate in about 10 to 14 seconds.
The standard lead time on these gate gas springs often vary depending on demand, please call our sales office for an update.
Please note that gas springs are NOT designed to resist well to vandalism.
If someone stands on the side of the gas spring: at best the internal seal will be damaged and the gas spring will starts loosing its force very slowly, at worst the gas spring will rapidly leak and one or both of the end-fittings will break.
For this reason, please ensure that the gate gas springs are out of reach of children and vandals.
Other sizes including a fully stainless steel version can of course be manufactured against your specification.
If you realise that the gas spring is too strong you can reduce the force using the internal ball valve. Before you do so, please note that the minimum working force for this gas springs is 100 newtons. If you reduce the force below 100 newtons (about 10kg), the gas spring's life may be shortened.