procurement of various rubber consumables for 60 mw machines of chibro power station , acryle nitrile base reinforced rubber seal. , synthetic rubber isolating gland seal od: 853.0 mm, id: 755.0 mm for shaft gland. , rubber ball dia 200 mm for air realease valve 6 of miv. , rubber flapper seatfor air release valve 6 od 300 mm, ball seat dia: 150 mm, id 100 mm , chevron rubber packing set consisting of 6 no. intermediate and 1 no. outer ring for lever side of miv. , chevron rubber packing set consisting of 6 no. intermediate and 1 no. outer ring for non lever side of miv. , packing for miv servo motor piston rod, od: 247.65 mm, id: 215.9 mm, thickness of complete set: 50.8 mm , packing for guide vaneservo motor piston rod, od: 209.55 mm, id: 177.80.9 mm, thickness of complete set: 50.8 mm , nitrile nylon threadedrubber cup seal, size-150 x 120 x 15 mm of 4 ball revovling flange of miv.