System for hydrochloric acid & sulfuric acid feeding with ATS pumps Fluids: Hydrochloric acid & sulfuric acid Hydrochloric acid/sulfuric acid corrodes wetted parts of the pump, so such acids cannot be fed directly. Point: Use pressurized resin reservoir with upper and lower parts divided by a flat valve. Sulfuric acid (or hydrochloric acid) First, pour acid in upper part of pressurized resin reservoir. Sulfuric acid (or hydrochloric acid) Pressurized special reservoir ATS pump feeds water into lower part of reservoir, and acids out from upper part of reservoir indirectly. This design of the reservoir makes it possible to feed acids at a constant volume with pump which contacts water only and will not be damaged by acids.