The large pulse jet bag filters developed by Sinoma-tec have been used in various ESP conversion projects (ESP to BF conversion technology). A series of bag filters have been designed to cater to production lines of different capacities. By the end of 2012, Sinoma-tec has successfully completed about 100 ESP to BF conversion projects for cooler and preheater de-dusting in cement production lines. These conversion projects feature effective operation, compliance with emission requirements, as well as low investment, system resistance, air leakage and energy consumption.