bids are invited for boq r and d 89 manually operated double flanged butterfly valve - manually operated double flanged butterfly valve . as per design std. bs en 593 & drilling std. will be is 1538 part iv & vi. 1) body - ductile iron is1865 gr.500/7 2) disc - ductile iron is1865 gr.500/7 3) shaft - stainless steel aisi 410 4) seal - epdm rubber 5) body seat ring - nickel weld overlay micro finished 6) bearing bush - steel backed p.t.f.e. cl ing ring - mild steel make- make - r&d multiples (metal cast) pvt. ltd. , rubber seal for 600 nb butter fly valve - rubber seal for 600 nb butter fly valve, moc - nitrile rubber, for manual butter fly valve, gearbox operated, 600mm nb, pn -06, make - r &d multiples (metal cast) pvt. ltd. , shear pin - shear pin (item 8 in standard configuration), material s s (aisi 304 or 410, matching the shaft and internal trim materials). for butter fly valve 600mm, pn -06, make - r&d multiples (metal cast) pvt. ltd. , long bearing bush - long bearing bush - steel backed ptfe self lubricated for butter fly valve 600mm, pn -06, make - r&d multiples (metal cast) pvt. ltd. , stub bearing bush - stub bearing bush, steel backed ptfe, self lubricated for butter fly valve 600mm, pn -06, make - r&d multiples (metal cast) pvt. ltd. , o ring - o ring - epdm/nitrile rubber shore hardness a 70 plus minu, is 3400-ii for butter fly valve 600mm, pn -06, make - r&d multiples (metal cast) pvt. ltd. , end cover bush - end cover bush (item 8 in standard configuration), material steel-backed ptfe, for butter fly valve 600mm, pn -06, make - r&d multiples (metal cast) pvt. ltd. , disc seal ring - disc seal ring - epdm/nitrile rubber shore hardness a 70 plus minu 5, is 3400-ii for butter fly valve 600mm, pn -06, make - r&d multiples (metal cast) pvt. ltd. total quantity : 32