Dominion Gas, A Praxair Company

Cylinder selection takes into consideration the chemical and physical properties of the gas mixture.

For reactive mixtures, we use cylinders that are internally coated and fitted with stainless steel valves to guarantee stability. To minimise the risk of cross-contamination, cylinders are only recycled for use with gas mixtures within the same group classification. For semiconductor applications, cylinders are restricted to specific product service to ensure the highest levels of accuracy and purity.

Cylinder preparation is critical in ensuring that no residual gas, particles or moisture are present to contaminate the mixture and the associated process application.

Cylinders are first heated to drive off any residual moisture, followed by thorough purging and evacuation to create a clean baseline.