Pipeline Dryers are primarily used to reduce water vapour content to a safe level in compressed air or process gas pipelines. These dryers are suitable for small-diameter pipelines, up to 10mm or ⅜”, and working pressure of up to 7 bar. They are usually filled with either silica gel or molecular sieves desiccant for water vapour or moisture removal. However, other compounds can also be removed using different molecular sieves. Dryers are usually filled with either silica gel or molecular sieves desiccant for water vapour removal. However, different grades of molecular sieves desiccant can provide selective adsorption of other components.