purchase of water supply maintenance materials i.e., gate valves, ms flanges, rubber wachers & gland rope in mahabubabad municipality under 15th f.c tied grant.-1.00 manufacture, supply and delivery of di d / f gate valves ( soft seated ) resillient seated soft sealing gate valves ( sluice valves ) with body bonnet of ductile cast iron of grade ggg40 / sg 40 / 12 or equivalent grade as per i.s:3896-part2-1985 and subsequent revisions, wedge fully rubber lined with epdm food grade quality and seals of nbr and the valves should be of vaccum tight and 100% leak proof with face to face dimensions as per bs5163-89 / isi 14846-2000 / din 3202 f4. all the valves should be with electrostatic powder coating both inside and outside pocket less body passage. drilled as per is: 1538. 6.00 150 mm dia 30.00 100 mm dia 20.00 80 mm dia 1no. ms flanges, 15mm thick, including nut bolts, and rubber insertion.etc.. conforming to is;1538 / 1993. 6.00 150 mm dia 15.00 100 mm dia 41.00 80 mm dia 203.05 supply and delivery of rubber packing excluding all taxes.