Control apparatus for areas within electricity, energy, petrochemical, metallurgy, water treatments, and etc. Control apparatus for air, water, steam, liquid, and a variety of corrosive media, mud, oil and other media. Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply and sanitary purposes; water filtering apparatus; water purifying apparatus and machines; water distribution plants; water supply installations; water purification installations; water softening apparatus; heating systems; electric heating apparatus; irrigation installations; pressure water tanks and parts therefor; air purification and filtration apparatus; hydrants (not for fire); fire hydrants, and etc