Bids Are invited for 3 Inch Nrv - Cs Non Return Valve, Bolted Cover, Flanged 150 Class, Body And Cover Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Bs1868 Or Similar, Insp & Test Std Bs 6755 Or Similar, Ends Flanged To Asme B16.5 Asa 150 Class , 4 Inch Nrv - Cs Non Return Valve, Bolted Cover, Flanged 150 Class, Body And Cover Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Bs1868 Or Similar, Insp & Test Std Bs 6755 Or Similar, Ends Flanged To Asme B16.5 Asa 150 Class , 6 Inch Nrv - Cs Non Return Valve, Bolted Cover, Flanged 150 Class, Body And Cover Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Bs1868 Or Similar, Insp & Test Std Bs 6755 Or Similar, Ends Flanged To Asme B16.5 Asa 150 Class , 12 Inch Nrv - Cs Non Return Valve, Bolted Cover, Flanged 150 Class, Body And Cover Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Bs1868 Or Similar, Insp & Test Std Bs 6755 Or Similar, Ends Flanged To Asme B16.5 Asa 150 Class , 2 Inch Gate Valve - Cs Rising Stem Gate Valve, Os And Y Bolted Bonnet, Body And Bonnet Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Api 600 Or Similar, Insp & Test Std Api 598 Or Similar Ends Flanged To Asme B16.5 Asa 150 Class , 3 Inch Gate Valve - Cs Rising Stem Gate Valve, Os And Y Bolted Bonnet, Body And Bonnet Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Api 600 Or Similar, Insp & Test Std Api 598 Or Similar Ends Flanged To Asme B16.5 Asa 150 Class , 4 Inch Gate Valve - Cs Rising Stem Gate Valve, Os And Y Bolted Bonnet, Body And Bonnet Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Api 600 Or Similar, Insp & Test Std Api 598 Or Similar Ends Flanged To Asme B16.5 Asa 150 Class , 6 Inch Gate Valve - Cs Rising Stem Gate Valve, Os And Y Bolted Bonnet, Body And Bonnet Astm A216 Gr. Wcb, Trim 13 Percent Cr, Rating 150 Class, Mfg Std Api 600 Or Similar, Insp & Test Std Api 598 Or Similar Ends Flanged To Asme B16.5 Asa 150 Class