Your comment- The design pressure of the shell is mentioned as 1.5 kg/cms2 g. Should it not be FV / 1.5 kg/cms2 g. Will there be any change in thickness if the ATFD is to be used for vac purposes also.

Our reply-This dryer’s normal operating pressure is atmospheric, hence having gland packing design.  It is not designed for vacuum condition and hence vacuum condition is not mentioned in the design data.
 