Stabilus IndustryLine gas springs are hydro pneumatic, closed and maintenance-free adjustable elements. The spring force F1 results from the internal pressure in the cylinder, which is generated by the filling medium nitrogen. On the gas spring, this pressure is applied to the cross-section of the piston rod. When no load is applied, the piston rod is always extended.
By pushing in the piston rod, the volume in the cylinder is reduced, and the gas is compressed. Thus the gas spring force increases (progression) depending on the diameter of the piston rod and the volume of the cylinder. Stabilus IndustryLine gas springs contain an oil filling for lubrication and end damping.