Traditional gassing
On the production line, the difference often lies in how the gas behaves inside the can. Depending on the type of gas and product, pressure build-up can vary, which affects dosing and process stability. This requires a method that fits the application, without the need for constant operator adjustments.
With impact gassing, a predefined amount of liquid propellant is injected into the can under pressure. The gas is introduced directly and distributed through turbulence in the product. This method is commonly used with LPG, but also with gases such as CO2. The direct injection results in rapid pressure build-up inside the can.
Another widely used method is time-over-pressure. In this case, the valve is opened and gas flows into the can until the internal pressure equals the supply pressure. This approach is mainly used with compressed gases such as CO2 and N2 and is simpler in setup than impact gassing.
Differences in use
The choice between these methods depends on what is being produced and under which conditions. Impact gassing requires less complex equipment and is often used where liquid propellants are needed. At the same time, the process requires careful handling of pressure and safety due to higher operating pressures.
Time-over-pressure is easier to control and operates at lower pressures. This makes the process more manageable in production, but affects the ratio between gas and product. In many cases, more headspace remains in the can, resulting in a lower product share.
The most suitable method is determined by the combination of product properties, desired filling level, and safety considerations. This is assessed per application.
Applications and Solutions
These gassing techniques are used across various industries, such as cleaning products, insect sprays, and personal care products. The choice of a specific method is linked to the type of propellant and the requirements of the final product.
The way the system is configured varies per situation. This can be a standalone unit or an integrated part of a production line, depending on the required capacity and process setup. In practice, this is determined together to ensure the system fits the application and runs reliably under production conditions.
