166. What is the function of device «C» shown in the illustration

Device C is a demister, removing liquid droplets from vapor produced in section G before it proceeds to the next stage. This separation is necessary to ensure pure distillate, as wet vapor carries entrained moisture that must be eliminated. The device's placement in the vapor path, utilizing mesh or baffles to trap droplets, confirms its function as a moisture separator, distinguishing it from access points, valves, or simple division plates.