The reverse mechanism of the bottom of a camping gas cartridge

It is well known that the bottom of an aerosol can is concave, and the concave bottom is used to support the pressure inside the can. The camping gas cartridge produced by Bluefire comply with the EN417 standard.

According to Clause 4.2.2 of EN417, all our camping gas cartridge must have concave bottom.

4.2.2 Gas cartridges with an outside diameter of 40 mm and above shall be provided with a concave base.

According to Clause 4.2.5 of EN417, the bottom for camping gas cartridge should reverse before the can leaks when the internal pressure reaches the threshold.

4.2.5 The concave form of the base of gas cartridges with an outside diameter greater than or equal

to 40 mm shall reverse in form before any leak appears or rupture occurs. However, for three pieces construction cartridges with valves, with an outside diameter greater than or equal to 40 mm, either the concave form of the base shall reverse or the domed top shall permanently extend before any leak appears or any rupture occurs.

For the camping gas cartridge produced by other manufacturers, when the internal pressure is too high, these cartridges will directly detach from the connection point between the bottom cover and the can body, without causing the bottom cover to reverse.

The design criteria for Bluefire: the burst pressure is between 18 - 22 bar, mainly around 20 bar.

So how does Bluefire design to avoid failure:

1. The shape of the concave surface of the bottom cover is specially designed to provide sufficient support.

2. A platform with a diameter of approximately 10mm is manufactured in the center of the concave of the bottom cover. When the internal pressure in the cartridge is too high, the bottom cover will first start to reverse from the central platform.

3. Bluefire uses high-quality and stable raw materials to manufacture the bottom cover, in order to ensure the stability of the burst pressure. By seen the picture above, a radial pattern has been formed on the surface of the bottom cover.

Bluefire has extensive experience in manufacturing camping gas cartridge, ensuring both performance and the stability of quality.