online electronic bids through electronic tendering system (ets)/ custom bid are inviting e-tender in two bid system for supply of filter bag for coal mill bag filter and cage for coal mill bag filter , material :cast aluminium alloy , filter bag for coal mill bag filter as per drg no.m2234-79 material: polyacrilonitile antistatic polyester non woven felt permeability:20m3/m2/min at 20mmwg max operating temp-200 c normal temp -150 c , cage for coal mill bag filter as per drg no.m2234-80 material :gi rod &gi sheet , ventury for coal mill bag filter as per drg no.m2234-85 , 02delivery period: delivery in two phases period within 04- 06 weeks.