The gas spring is a hydropneumatic adjustment element consisting of a cylinder, piston rod and specific piston. A special sealing and guidance system seals the cylinder. The gas spring is filled with nitrogen.
Compared to a traditional (coil) spring, the gas spring has a very flat curve. This flat curve can be achieved even with a very large stroke. This unique feature is crucial in any situation where a weight needs to be balanced or moved.
The force of the gas spring is determined by the difference in surface area on both sides of the piston.
A gas spring consists of a cylinder (C) and a piston rod (S) to which the piston (P) is attached. When the piston rod is pressed into the cylinder with the piston, the nitrogen moves from chamber (B) to chamber (A) by special channels. By adjusting these channels, we can adjust the behavior of the gas spring, such as speed and damping. The pressure in both chambers is the same, so the difference in surface area of the piston on side (A) and side (B) ensures that the piston rod is always pushed out of the cylinder. This reaction produces the force of the gas spring. Read more about the working of gas springs.
Measuring the force(s) of our gas springs is done by means of special tools at room temperature with the cylinder pointing upwards. All forces are measured in newton [N] and are static. For some customers we communicate all values in [kg].
The gas spring force and which should be on the gas spring is called the F1. This is the minimum force that the gas spring delivers. The ratio between F1 and F2 or F3 and F4 is called the progressivity. In short, the increase of the force when the gas spring is pressed.
The difference between F1 and F3 as well as the difference between F2 and F4 is the friction. Both values (progressivity and friction) can be adjusted on request in order to create the perfect gas spring for every situation.
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