Technical Information About Gas Springs – Esunbright

Gas springs are versatile components used in various applications for controlled opening and closing movements. They are commonly used in hatches, hoods, ventilation apertures, chairs, beds, windows, tools, and machinery. At Esunbright, we offer a wide range of gas springs designed to meet different requirements. In this article, we will provide you with technical information about gas springs and their characteristics.

Mechanical Gas Spring 2
Mechanical Gas Spring 2

Components of a Gas Spring

A gas spring consists of several key components that work together to provide the desired functionality. These components include:

  1. Cylinder: The cylinder is a sealed container filled with compressed nitrogen gas. It applies equal pressure on both sides of the piston.
  2. Piston Rod: The piston rod extends from the cylinder and has a piston head attached to it. The surface area of the piston rod side is smaller than the opposing side, creating a pushing force.
  3. Seal: The seal ensures that the gas remains contained within the cylinder, preventing leakage.
  4. Guide: The guide helps to keep the piston rod aligned and provides stability during the movement.

Gas Spring Characteristics

Gas springs have some unique characteristics that distinguish them from other types of springs. These characteristics include:

  1. Pre-Tension Force: Unlike most other springs, gas springs have a built-in pre-tension force. This means that there is only a small difference in force between full extension and full compression.
  2. Flat Spring Characteristic: Gas springs exhibit a flat spring characteristic, meaning that the force remains relatively constant throughout the stroke.
  3. Pressure and Force Relationship: As the piston and piston rod are pressed into the cylinder, the volume reduces, and the pressure increases. This causes the pushing force to increase. The increase in force is typically around 30% at full compression.

Force Calculations of Gas Springs

Calculating the required force for a gas spring can be done using a formula that takes into account various factors. can simulate different applications and help determine the force requirement. In simpler cases, the force can be calculated using the following formula:

F1 = (G x L) / (W x n) + 10 – 15% margin of error


  • F1: Gas spring force in Newton
  • G: Gravitational pull in Newton of the moving part
  • L: Horizontal distance from the swivel point E to point S in the open position
  • W: Smallest distance to point E
  • n: Number of gas springs

By entering the relevant values into this formula, you can quickly determine the required force for your specific design.

Force Tolerances

Gas springs, like any other mechanical component, have tolerances that can affect the actual force exerted. The following table shows the force tolerances for different ranges of force:

Force (N)Tolerance
F1 ≤ 100+/- 10
100 < F1 ≤ 200+/- 20
200 < F1 ≤ 600+/- 30
600 < F1 ≤ 1200+/- 50
F1 > 1200+/- 100

It’s important to note that external factors, such as temperature changes, can also affect the force of the gas spring. As the ambient temperature rises or falls, the force of the gas spring can increase or decrease accordingly.

Lifetime of a Gas Spring

The lifespan of a gas spring depends on various factors, including its design, operating conditions, and external influences. Esunbright gas springs are designed to have a maximum force loss of 10% after 40000 cycles at room temperature and in ideal fitting circumstances. However, it’s essential to consider that gas springs have a shelf life due to the aging and wear of the sealing material.

External factors, such as temperature changes and environmental influences, can accelerate seal aging and wear, leading to a faster force loss. Proper fitting and avoiding vibrations and lateral forces can help prolong the lifespan of a gas spring. It’s recommended to choose a gas spring with a larger cylinder volume for the required force to ensure longevity.

Advice for the Use of Gas Springs

To ensure safe and optimal performance of gas springs, here are some essential tips to keep in mind:

  1. Gas springs are pressure vessels and should not be opened without following the proper instructions for recycling. Avoid exposing gas springs to excessive heat or flames.
  2. For conventional gas springs, it is recommended to fit them in a way that the piston rod points downwards during use. This allows the hydraulic damping to function optimally.
  3. Gas springs should not be exposed to damaging external influences or violent handling. Any visible damage to the piston rod or cylinder can compromise functionality and safety.
  4. Consider the ambient temperature range for gas spring operation. Extreme temperatures can affect the force exerted by the gas spring.
  5. Gassprings should be regularly inspected for any signs of leakage, damage, or loss of force. If any issues are detected, it is advisable to replace the gas spring.


Gas springs are versatile components used for controlled opening and closing movements in various applications. They consist of a cylinder, piston rod, seal, and guide. Gas springs have unique characteristics, including a built-in pre-tension force and a flat spring characteristic. The force exerted by a gas spring can be calculated using a formula that takes into account gravitational pull, distance, and the number of gas springs. It’s important to consider force tolerances and external factors that can affect the performance of gas springs. Regular inspection and maintenance are essential to ensure the safe and optimal functioning of gas springs.


  1. Are gas springs suitable for heavy-duty applications?
    Gas springs can be used in a wide range of applications, including heavy-duty ones. However, it is crucial to select the appropriate gas spring with the required force and design considerations to ensure optimal performance and longevity.
  2. Can gas springs be used in extreme temperatures?
    Gas springs have temperature limitations, and extreme temperatures can affect their performance. It is recommended to consider the ambient temperature range for gas spring operation and choose a gas spring that is suitable for the intended temperature conditions.
  3. What should I do if I notice a loss of force or damage in my gas spring?
    If you notice a loss of force or any damage in your gas spring, it is advisable to replace it. Regular inspection and maintenance are essential to ensure the safe and optimal functioning of gas springs.

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