supply and delivery of valve and accessories required for maintenance of different mi installation within bankura-i(a-m)sub-division under bankura(a-m)division under np/mtn programme 2024-2025 , alfa alfa valve c type 150 mm dia (nb) made of c.i. as per is : 210/2009 with latest amendments, as per annexed drawing & technical specification , supply & transportation of 150 mm (nb) c.i. d/f non-rising spindle type sluice valve pd (water works) p.n 106 with hand wheel conforming to is 14846/2000 with latest amendment, duly isi marked. , 150 mm dia rubber insertion(as per sample)5 mm thick,2ply,as per is 638/79 with latest amendments with 6 nos. hole(table-17) , supply & delivery of gland packing 10 sq mm (graphite natural fibre packing, champion make , champion style no. 3116) , 150 mm dia (n.b) foot valve leather washer of 5 mm thick conforming is 1015/2000 (burhani/techno-other brand) , 6307 ball bearing(skf make)