procurement of various size gate valves and ball valves for 1x500 mw chp at sgtps mppgcl birsinghpur , cast iron sluice gate valve as per latest amendments of is:14846:2000, pressure rating:- pn-10, body material cast iron is:210 gr fg-200 with counter flange & rising spindle of ss-410, internal working parts & yoke, bush & backseat of gunmetal, bolted bonnet & outside screw & yoke type, flange drilled to bs:10, table d with ci hand wheel operated, hydraulic test pressure body 15 kg/sq cm and seat & back seat 10 kg/sq cm with counter flanges, bolts, nuts & rubber gasket for following size valves rating -pn-10 , 25 nb , 32 nb , 40 nb , 50 nb , 80 nb , 100 nb , 150 nb , ball valve with nipple on both side rating - pn-10 , 12 nb (1/2”) , 18 nb (3/4”) , 25 nb (1”)