Evaluation of performance parameters ofindigenously developed roots pumping system

Abstract

Roots pumping systems are widely used in industries to generate vacuum with high pumping speed. In the present work, the performance parameters of indigenously developed Roots pumping system have been studied. The performance parameters being studied are the ultimate pressure, working temperature, compression ratio and pumping speed. Ultimate pressure of the Roots pump after continuous running of eight hours is found to be 1.1×10-3 mbar. The most important parameter of the roots pump is the zero-gas flow c ompression Ratio(Ko) which is found to be 18 for the pumping system under study. Efficiency of Roots pump isfound to be 76% which is in good agreement as reported in the literature.