Nitrogen gas springs are high-pressure vessels. It’s important to carefully read the use instructions on SF Bordignon’s catalogue before use. 

Yes, the correct fastening – as described in the guidelines included in our catalogue – guarantees the durability and efficiency of nitrogen gas springs.

Generally, the minimum loading pressure is 30 bar. If lower loading pressure are required, please contact for technical support.

Yes, you can download the certifications from the Download area of the Brodignon website Download | Catalogs, certifications and Forms | Bordignon.

No, nitrogen gas springs develop an initial force (“at contact” force) without the necessity of pre-compression. For some nitrogen gas springs sold in the market (but not by SF Bordignon), pre-compression could be suggested according to a different construction design, with a different level of safety.

Thanks to their reliable construction and advanced technology, the nominal stroke of SF Bordignon’s nitrogen gas springs is usable at 100%. Moreover, a safety extra-stroke is present (from 1 mm to 3 mm according to models). For some nitrogen gas springs sold in the market (but not by SF Bordignon), a “reserve” stroke could be suggested according to a different construction design, with a different level of safety. 

The final forces (full-compression force, force at stroke limit) are indicated in our catalogue and are reference values measured in static conditions. The real final force developed during use may vary, since depending on the specific parameters of the application, as for example the working speed (cycles-per-minute). The same is true, consequently, for the “intermediate” forces. The variation of the force developed according to the used stroke is not actually linear, even if the linear variation constitutes – in static conditions – a very good approximation. The deviation from the actual trend is, for practical purposes, irrelevant. It’s not useful to indicate a hypothetical exact curve of the force trend vs. used stroke, since that can vary according to the different parameters of usage (in case of assuming both static conditions and eventual “reasonable” polytropic coefficients, but in any case, unique and then totally indicative). The linear approximation, at most, eases the calculations of the designer.

Yes, but it is always necessary the fastening at the base with screws, also inside a hole. Please check the instructions in our catalogue for further details (diameters of the holes etc.).

Yes, you can get in touch with our Sales Office, and we will suggest you our best solution. To evaluate the possible interchangeability, please inform us about the fastening modalities (and more eventual relevant parameters) currently in use. Anyway, we highlight that mould producers and users can take full advantage from SF Bordignon’s high quality nitrogen gas springs when they are chosen for a new project.

For each nitrogen gas spring, the maximum charging pressure is indicated in catalogue and laser-engraved on the body of the nitrogen gas spring.