Tvm bag filters offer high efficiency, less maintenance and longer life. The fabric of the filter bag is anti-static, needle felt of different densities, sealed by snap rings to ensure easy removal of the bags and cages. Automatic cleaning is by pulse jet [compressed air] through venture nozzles. These bag filters can handle high dust loads, moistures dusts, flue gases at high temperature because of the most suitable selection of filter fabric and filter area. Outlet emission levels can be assured less than 100 mg/nm³ through these filters. Cyclones are normally used for collection of coarse dust particles and are effectively designed to remove dust with an emission level of 200 mg/m³. For high dust loading condition they act as primary filtering system before the bag filter. They do not require any maintenance. Multi-cyclones are offered to handle larger volumes of gas and to achieve better operating efficiencies. Rotary air cut valves or double flap valves are used as discharge devices to these cyclones.
