Paharpur Cooling Towers Ltd. Manufactures Concrete Structure Mechanical Draught Cooling Tower. Paharpur Cooling Towers Ltd. Is an ISO 9001 certified company. The company manufactures Cooling Towers and Air Cooled Heat Exchangers. The Concrete Structure Mechanical Draught Cooling Tower consists of primary design features like non-combustibility and a unique design that offers compact sitting, reduced piping and water supply economy. Precast and prestressed structural components reduce construction time. Choice of treated wood, concrete and plastic fills for longevity and durability are available.