procurement of various sizes of butterfly valves and flanges for sg/tg phe, debris discharge valves and acw system , various sizes of butterfly valves & flanges , 150nb wafer type hand operated butterfly valve with heavy duty worm gear assembly with required fasteners make : m/s. delval or its equivalent type : wafer short type, body : ci is 210 fg 220, disc : ss316 (cf8m) body seal : nitrile rubber/epdm, shaft : ss410, fluid medium : sea water, fluid pressure : 10kg/cm2 heavy duty gear box (worm & gear shaft): en36, surface hardened temperature to 55-60 hrc , 200nb wafer type hand operated butterfly valve with heavy duty worm gear assembly with required fasteners make : m/s. delval or its equivalent type : wafer short type, body : ci is 210 fg 220, disc : ss316 (cf8m) body seal : nitrile rubber/epdm, shaft : ss410, fluid medium : sea water, fluid pressure : 10kg/cm2 heavy duty gear box (worm & gear shaft): en36, surface hardened temperature to 55-60 hrc , 250nb wafer type hand operated butterfly valve with heavy duty worm gear assembly with isi marking bs 5155, class 150 with companion flange required fasteners make : m/s. delval or its equivalent type : wafer short type, body : ci is 210 fg 260, disc : ss316 (cf8m) body seal : nitrile rubber/epdm, shaft : ss316, fluid medium : sea water, fluid pressure : 10kg/cm2 heavy duty gear box (worm & gear shaft): en36, surface hardened temperature to 55-60 hrc , nb 400 mm wafer type hand operated butterfly valve with heavy duty worm gear assembly with isi marking bs 5155, class 150 make : m/s. audco or its equivalent type : wafer short type, body : ci is 210 fg 200, standard : bs 5155 class 150 disc : ss316 (cf8m) body seal : nitrile rubber/epdm, shaft : ss410, fluid medium : sea water, fluid pressure : 10kg/cm2 heavy duty gear box (worm & gear shaft): en36, surface hardened temperature to 55-60 hrc , nb 450mm wafer type hand operated butterfly valve with heavy duty worm gear assembly with isi marking bs 5155, class 150 required fasteners make : m/s. audco or its equivalent type : wafer type, body : ci is 210 fg 260, standard : bs 5155 class 150 disc : cf8m (ss316) body seal : nitrile rubber, shaft : ss316, fluid medium : sea water, fluid pressure : 10kg/cm2 heavy duty actuator-worm shaft & worm gear: en36, surface hardened temperature to 55-60 hrc , nb 600mm wafer type hand operated butterfly valve with heavy duty worm gear assembly with isi marking make : m/s. audco or its equivalent type : wafer type, body : ci is 210 fg 260, standard : bs 5155 class 150 disc : cf8m (ss316) body seal : nitrile rubber, shaft : ss316, fluid medium : sea water, fluid pressure : 10kg/cm2 heavy duty actuator-worm shaft & worm gear: en36, surface hardened temperature to 55-60 hrc , 150nb ss flange make : m/s. pse or its equivalent material : ss316l, sch 40 class -150 , 200nb ss flange make : m/s. pse or its equivalent material : ss316l, sch 40 class -150 , 250nb ss flange make : m/s. pse or its equivalent material : ss316l, sch 40 class -150 , 400nb ss flange material : mild steel, sch 40 class -150 , 450nb ss flange material : mild steel, sch 40 class -150