As we all know, custom gas mixes are inclined to be expensive and are often delivered in canisters that cannot be returned to the supplier and are difficult to recycle or be discarded. Furthermore when these canisters are left unused over time stratification of the gasses is likely to occur.
How can costs be reduced? By having a supply of pure gasses allows you to adjust the concentration of a constituent for a different end result. Its understandable why many processors mix gasses on site.
In a dynamic system, your mixture may not always be 75% Gas 1 + 25% Gas 2. How do you adjust if your mixture changes to 25% Gas 1 + 75% Gas 2 the next day, and then changes again to 50% Gas 2 + 50% Gas 3 two days later?.
When selecting flow controllers for a mixing operation it is vital that careful consideration be taken of your potential mixes.
Continuous pressure becomes important in numerous mixing applications. Bad welds occur in welding when there is a loss of pressure in the shield gas. Due to gas mixing systems not being on 24/7, as well as the change of demand due to multiple systems coming on or offline, pressure loss occurs.
To guarantee a system delivers gas efficiently, good pressure sensing, an adequate flow control and source need to be provided. Building a system and having all components of the system integrated and working concurrently is crucial and should be completed by a Software programmer at the mixing site.
Lab Unlimited offer mass flow controllers that have beneficial features making them an optimal solution for custom gas mixing systems:
Gas mixing systems flowing to pressures near or above atmospheric pressure is shown to be typical in the above provided figure illustrating a system of components. Control valves are between the measurement head and vacuum chamber, which is also where the controllers need to be constructed if exit pressures in the vacuum range are a necessity to the application.
Looking for a turnkey gas mixing system? Check out Fusion Flow Technologies provided by Lab Unlimited
The reduction of gas separation and stratification can be achieved by supplying a turbulent mixing tube in the flow path downstream of the mixed components. Third-party sources provide the cost-efficient components in various different materials.
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