Betelgeuse Project introduction — Aerosol Can sealing, opportunity for a new future.
Standard can sealing option – The limits
The standard can/valve assembly is complex and requires a great mastery of the processes at all levels and in particular how to control the filling conditions and to master the capability of its clinching dimensions.
Moreover, the mounting cup valve shape is not designed to resist to the high internal pressure.
To increase really the can/valve pressure resistance, it is necessary to accept a significant price can and valve increases that need to be reinforced.
The Aerosol Directive
It is important to note that the 21 November 2016 publication of the Aerosol Directive 75/324, 4th Adaptation to Technical Progress, the aerosol directive now permits to fil aerosol can up to a pressure of 15 bars – at 50°C – for compressed gases or dissolved gases not flammable.
The can internal pressure resistance which will be conditioned at 15 bars at 50°C will have to be 15 * 1.5 = 22.5 bars internal pressure resistance minimum. This means that the can must have a first deformation or a bottom bulging of at least 22.5 bar and have to burst at a pressure greater than 27 bars.
The can/valve connection must be able to withstand at least 27 bars.