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It's amazing that the amount of news that happens in the world every day always just exactly fits the newspaper but some time you need a bigger newspaper.
22
Oct 2018
Gas Ballast in Vacuum Pump Aids Evacuation
Any time the internal piping or components of a refrigeration system are exposed to atmospheric air, they must be completely evacuated before refrigerant can be added into the system. Proper evacuation of a system is an important part of the overall repair or installation process — it ensures that no atmospheric air remains in the system and mixes with the refrigerant.