# The Aerosol Dispensers Regulations 2009, Paragraph 4.1.4: Filling


(a) Aerosol dispensers filled with compressed gas shall not be required to withstand a pressure of more than 9 bars at 50°C.
(b) Aerosol dispensers filled with dissolved gas shall not be required to withstand a pressure of more than 8 bars at 50°C.
(c) Aerosol dispensers containing liquefied gas or mixtures of liquefied gas shall not be required to withstand, at 20°C, pressures higher than those shown in the following table:
Total capacity
Percentage by weight of liquefied gas in the total mixture
20 %
50 %
80 %
50 to 80 ml
3.5 bars
2.8 bars
2.5 bars
< 80 to 160 ml
3.2 bars
2.5 bars
2.2 bars
< 160 to 220 ml
2.8 bars
2.1 bars
1.8 bars
This table shows the pressure limits permitted at 20°C in relation to the percentage of gas.
Pressure limits for percentages of gas not shown in the table shall be extrapolated from it.

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Source: https://www.legislation.gov.uk/uksi/2009/2824/schedule/1A/paragraph/4.1.4 (the official version)
Page: https://openlegislation.uk/aerosol-dispensers-regulations-2009/schedule-1A/paragraph-4.1.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.