SELECTION AND PERFORMANCE CHARACTERISTICS OF BOREHOLE PUMPS FOR TUBEWELLS

Abstract

This present study is an attempt to formulate the pro-cedure for selecting a pump to suit a particular job condition. The factors affecting selection are least maintenance cost, high efficiency in operation and a trouble-free working, and the best model out of all available models in the market is selected. The procedure of selection is demonstrated with an example relating to a specific job condition• In the first few chapters the construction and application of different types of pumps used in agriculture service are described. These include the horiwntal centri-fugual, the vertical turbine and the submersible types. J comparison of the last two types is also provided which aids in selection. The maintenance, testing and economics of different pumps are then discussed. The testing of pumps includes procedure field tests and laboratory tests which have been discussed in a separate chapter. These tests help checking performance after install-ing of a pump at site. The performance records maintained for tests are also indicated. These records are helpful in guidance in the future. In the end the economics of pumping has been discussed, taking into account the running and operational costs of the equipment fixed charges for its initial cost, and other civil works constructed, for efficient distribution of water for irrigation purposes. Studies reveal that from a tubewell for irrigation purposes water costs 5940 gallons per rupee including all costs.