Common upsets include feed water concentration spikes, pressure and temperature swings, flow changes or disruptions, changes in pressure drop, and operating control issues. It is recommended to immediately call ZeochemTechnical Service once the upset is discovered. After review of the details and the current operation, Zeochem will provide a technical assessment and makerecommendations to return the plant to normal operation. In many cases the unit can be lined out, however, sometimes the molecular sieve is damaged to the point where the adsorption capability is compromised. In these cases a reload of fresh sieve may be required. Our Technical Service team can help determine if that is necessary. It is also very important to identify the source and the cause of the upset so that measures can be taken to prevent it from happeningagain in the future.