Guía definitiva para escoger resortes de gas sin conocimientos técnicos
Choosing the right gas spring, gas strut, or gas damper doesn't have to be complicated. Although it may seem like a technical component, knowing a few basic concepts will help you easily find the perfect model for your sofa bed, fold-down beds, gas springs for kitchen furniture, industrial applications, industrial machinery, doors, or lift systems, ensuring optimal opening and closing.
Below, we explain in a clear and simple way everything you need to consider when selecting the right gas spring from our catalog of custom gas springs.
1. The force of the gas spring (N)
The force of a gas spring is measured in Newtons (N). This value indicates the spring's ability to lift a heavy surface and control its descent smoothly and safely.
The Newtons engraved on the gas spring reflect:
• The thrust force exerted by the gas spring to lift doors or other types of surfaces.
• The internal pressure of the gas. The compressed gas contained in the gas spring.
• The resistance required to open and close the system correctly.
How to convert kilograms to Newtons?
The conversion is very simple:
1 kg is approximately equal to 10 N
For example, if a lid or door weighs 20 kg, you will need around 200 N of force in the gas spring.
Guideline examples of force for gas struts for divan beds
In the case of lift-up divan beds, manufacturers make it very easy to choose the spring, as the force required is usually directly related to the width of the mattress.
Guideline values for total force (sum of the two gas springs):
• 800 N → 80 or 90 cm divan beds
• 1250 N → 120 or 135 cm storage beds
• 1500 N → 150 or 160 cm storage beds
These values serve as a general reference. Whenever possible, it is advisable to consult the manufacturer's tables to confirm the exact force required for the storage bed model.

GasspringsEU label with information on the 14/28 gas spring, 550 mm long, with a resistance of 2000N and sufficient gas pressure to lift very heavy doors.
2. Total length of the gas spring
Measuring the length of the gas spring is easier than it seems. You just need to do it with the spring fully extended.
The correct measurement is taken:
• From the center of the head or fixing point at one end
• To the center of the head at the other end
The reference image clearly shows how to take this measurement. Wasn't that easier than you expected?

8/18 Gas Spring of 175mm complete long
3. Heads or fastening types
Heads are terminals that connect the gas spring to the surface to be lifted. Choosing the right head is key to ensuring safe and functional assembly.
The most common types are:
• Ball fastening
• Nut fastening

Choosing the right type will ensure a perfect fit between the gas spring and its application. It is also important to include the total length of the head.
In summary: key points for choosing gas springs
To choose the right gas spring, you just need to be clear about these three aspects:
✔️ Force (N)
✔️ Total extended length
✔️ Type of heads or fastening
With this information, you can choose your gas spring or piston with complete confidence, without the need for technical knowledge.
At Gas Spring EU, our online store for gas springs in Spain, manufactured in steel and stainless steel, we work every day for and with our customers and are available to answer all your questions.
Remember that we ship gas springs throughout Spain within a maximum of three business days. Check our shipping policies here.
Before installing a gas spring, it is important to consult the Legal Notice and company policies, as understanding how springs work helps to understand why gas varies its internal pressure to generate force in a safe and controlled manner, both in domestic applications and in a toy box, ensuring correct and responsible use of the product.
In our blog, you will find detailed information about gas springs and their many applications , where we explain their function as shock absorbers, how they compare to hydraulic pistons, and their different uses as pneumatic lifts in professional environments and car trunk dampers, among others. In addition, we analyze solutions for industrial, domestic, and even marine gas springs. The wide range of models available and specific systems, designed to meet different needs, allow us to specifically meet the needs of each customer.
If you still have questions, don't worry, our customer service will help you. Write to us on WhatsApp, call us, or send us an email, and we will help you with everything you need so that you get the spring you are looking for and not frustration.