What are the limitations and the most common causes of dryer failure?
Nafion is extremely corrosion resistant. No compounds that exist in the vapor phase within the operational temperature range of Nafion are known to attack it. Even hydrofluoric acid or other concentrated acids are tolerated by Nafion. The corrosion limitations of Nafion dryers and humidifiers are due to the materials used for housings and gas connections. Perma Pure offers product configurations that will tolerate almost any sample matrix. Pressure limitations of the dryers and humidifiers are also due to the housings and gas connections. Versions are available that will tolerate up to 150 psig (10 bar), depending upon design. Although Nafion will tolerate temperatures as high as 190°C, a maximum operating temperature of 150°C for Nafion dryers and humidifiers is recommended. Nafion is a strong acid catalyst and, as operating temperatures rise above 110°C, unwanted chemical reactions may be stimulated within the sample gas matrix. For this reason, most dryer installations operate at 10
