The pharmaceutical sector has more demanding standards than most other industries. High value raw ingredients and batch processing make reliability a high-order requirement. The health and safety implications of cleanliness to the quality of the final product are crucial and any risk of contamination must be virtually eliminated so stainless steel with a crack and crevice free construction is frequently specified rather than a special paint finish, as the best solution to eliminate any risk of contamination. The motor and bearing cartridges can be encased with a removable, polished, stainless steel shroud to facilitate easy access and strip-down for frequent cleaning and maintenance. ATEX certified designs are frequently called for to handle highly volatile compounds or gases such as ethylene oxide gas.