bids are invited for a - supply of gate valves cast steel body, renewable seat and disc, bolted bonnet, rising stem both ends flanged and drilled to asa 150 lbs rating, raised face conforming to ansi b 16.5.valves shall to design and tested as per api 600 and api 598size: 25 nb , b - supply of gate valves cast steel body, renewable seat and disc, bolted bonnet, rising stem both ends flanged and drilled to asa 150 lbs rating, raised face conforming to ansi b 16.5.valves shall to design and tested as per api 600 and api 598size: 50 nb , c - supply of gate valves cast steel body, renewable seat and disc, bolted bonnet, rising stem both ends flanged and drilled to asa 150 lbs rating, raised face conforming to ansi b 16.5.valves shall to design and tested as per api 600 and api 598size: 80 nb , d - supply of gate valves cast steel body, renewable seat and disc, bolted bonnet, rising stem both ends flanged and drilled to asa 150 lbs rating, raised face conforming to ansi b 16.5.valves shall to design and tested as per api 600 and api 598size: 100 nb , e - supply of gate valves cast steel body, renewable seat and disc, bolted bonnet, rising stem both ends flanged and drilled to asa 150 lbs rating, raised face conforming to ansi b 16.5.valves shall to design and tested as per api 600 and api 598size: 150 nb , f - supply of gate valves cast steel body, renewable seat and disc, bolted bonnet, rising stem both ends flanged and drilled to asa 150 lbs rating, raised face conforming to ansi b 16.5.valves shall to design and tested as per api 600 and api 598size: 200 nb , g - supply of wafer type butterfly valve (pn 16) with ci body, ss discand valve suitable to fit between flanges drilled to ansi b 16.5, 150 lb rating.the valve shall be designed and tested to bs 5155 and bs 6755size: 50 nb , h - supply of wafer type butterfly valve (pn 16) with ci body, ss discand valve suitable to fit between flanges drilled to ansi b 16.5, 150 lb rating.the valve shall be designed and tested to