In the present study a cast iron pulley operated centrifugal pump was selected which has 11 components namely casing, impeller, shaft, pulley, bearing stand, bearing cover, top flange, bottom flange, gland, counter weight and base. It was found that the present existing centrifugal pumps have many technical disadvantage related to its cost, weight, corrosion and wear and tear. During the study it was found that these technical disadvantages can be overcome by replacing the metallic parts of pumps with the engineering plastic materials. There are polymeric materials like Poly Phenylene Oxide (PPO) or Noryl, Delrin, Vespel, Zytel, Cast Nylon, Ultra High Molecular Weight Polyethylene (UHMWPE) and Poly Ether Ether Ketone (PEEK) are commercially available in the market. It was noticed that the total weight of the metal pump was 5.7 kg and polymer pump was only 1.7 kg. By replacing the metal components of centrifugal pump with the polymers the weight of the pump was reduced by 70 per cent and become very light in weight. The mold cost of one polymer pump was 24.5 lakh and production cost one polymer pump was Rs.485 when compared to metal pump market price of Rs. 1200. The projected cost of 1 lakh polymer pumps was Rs. 4.85 cr. and 1 lakh metal pumps market price was Rs. 12 cr. and the difference of cost was Rs. 7.15 cr. The projected cost of 5 lakh polymer pumps was Rs. 24.25 cr. and 5 lakh metal pumps market price was Rs. 60 cr. and the difference of cost was Rs. 35.75 cr. By replacing the metal pump with the polymer pump the cost of the pump was reduced by 59.6 per cent, making it very cheap.

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