Frequently Asked Questions

What is a gas spring and how does it work


What is progression

Where can I use gas springs

Life expectancy of a gas spring

Can my old gas springs be refilled






What is a gas spring and how does it work

At the end of the 19th century a patent has been given to the concept gas spring. The gas spring is a closed system with an innerly defined pressure of nitrogen. It consists of a piston, piston rod, cylinder, guiding piece, seals, end fittings and small amount oil for lubrication and end damping. The pressure inside the cylinder multiplied by the crossection of the piston rod (F=p*A) defines the extension force of the gas spring. The highest pressure possible inside a fully extended gas spring is 160 bars, it increases when compressing the gas spring. The difference in pressure in front and behind the piston makes that the piston rod of an unloaded gas spring is always in its fully extended position.


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What is progression

When compression the piston rod the rod takes up space thus effectively decreasing the volume inside the cylinder, the lesser volume of the cylinder combined with still the same amount of gas makes that the pressure rises inside the cylinder, this is what we call progression. With gas tension springs the situation is turned around, here the unloaded tension spring is fully compressed and at extension the pressure inside cylinder will rise.

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Where can I use gas springs

Gas springs can be used in a wide variety of applications. Such as pushing, lowering and lifting of heavy loads. Be reminded that gas springs are only mend to assist you; therefore they should never be used as a safety device!! If there is a chance that gas spring failure can cause personal or material damage a locking device (also available at SpringMasters) should be installed!!!

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Life expectancy of a gas spring

All gas springs lose force over time. The life expectancy of a gas spring is strongly depended on the correct installation (no friction) preferably gas springs should be mounted with the piston rod downwards. If gas springs are exposed to sand, dirt, paint and other external elements, which might scratch the piston rod, a protective cover tubes (also available at SpringMasters) should be used. Gas springs are only used to lift and assist in opening and moving your applications. With keeping all of the above in mind it is hard to give an exact life expectancy, however in testing environments gas springs should last about 40.000 gas tension springs about 10.000 and blockable springs about 20.000 strokes.

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Can my old gas springs be refilled

The gas spring is a closed system with an inner pressure of nitrogen; any loss of pressure over time is most likely to be caused by worn out seals. Therefore it is not possible to change any internal parts of the gas spring and a new one should be fitted.

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