supply and delivery of different dia. cidf sluice valves for laying of distribution main pipeline for augmentation of keshiary piped water supply scheme within keshiary block under kharapgur sub-division of midnapore division phedte in paschim , list of materials :- supply & delivery of different dia. c.i.d.f. sluice valves / air valves ( special type ) pn-1.0 of different dia. make with cast iron double flanged non-rusting spindle sluice valves generally conforming to is :14846 / 2000 with latest ammendment, if any, having body door dome / bonnet and cover of cast iron gr. f.g.200 mm, spindle of is : 6603 gr.-12, gr.-13 non magnetic, nut & seat rings are of gunmetal as per is : 318 ltb -2 flanges flat freed and drilled to is : 1538 part-iv & vi valves are suitable for miximum working pressure of 10 kg. / sqm.cm ( seat test ) and body test to 15 kg. / sqm.350 nb and above valves are provided with enclosed gear box and antifriction device for easy of operation. ( as per phe sor ) nb : procurement will be made from the reputed manufacturers as per departmental vendor list and test certificatefrom the manufacturersas well as inspection certificate from the trird party inspection, copy to be arranged by their own cost.a ) 250 mm. dia. , ( b ) 200mm dia. , ( c ) 150mm dia. , ( d ) 125mm dia. , ( e ) 100mm dia. , ( f ) 80mm dia.