C. Doctor india is an iso 9001: 2000 certified company manufacturing blowers, axial fans, heat exchangers, vacuum cleaners, bag filters, humidifiers, vacuum pumps etc. Pulse jet type filters, we series, offers sequential cleaning of the filter element, one after the other, the dust collection and filter cleaning can be simultaneous. Cleaning is at a substantially higher pressure, hence on line cleaning is possible without isolation of the chamber required to be cleaned. Here are the standard design features of "we" series filters: