Kilns; Cooling units for industrial purposes; Dryers used for the removal of solid, liquid and vapor contaminants from compressed air and gases; Drying apparatus for chemical processing; Economisers, namely, devices for warming feed water in heating boilers; Evaporators for chemical processing; Fluid separation apparatus for separation of gas from liquid in a chemical or oil refinery; Heat exchangers for chemical processing; Heat exchangers, other than parts of machines; Heat generators; Heating units for industrial purposes; Industrial boilers; Industrial furnaces; Plumbing fittings, namely, valves; Recuperators for chemical processing; Rotary kilns; Steam generating installations; Steam superheaters; Waste processing machines using heat and chemical breakdown processes
Environmental Control Apparatus