Real Elevators Limited manufactures Steam Boiler with Air Tight Helical Coil. Real Elevators Limited is an ISO 9001:2000 certified company. Real Elevators Limited offers different types of tractions lifts and hydraulic lifts, escalators, dumbwaiter, manual door lift etc. The Steam Boiler with Air Tight Helical Coil is made using Reverse Flame Technology. The furnace is made of an air tight helical coil of membrane wall construction, placed inside an assembly & double jacketed MS shell and aluminium radiator. Combustion air is forced through the jacketed shell, thereby getting pre heated and keeping the outer shell cool. The Steam Boiler with Air Tight Helical Coil has specially designed heat optimizer protects the feed water pump from high feed water temperature, thus enhancing the life of the pump.