supply of gate valves , supply of items as per following specifications , gate valve with bolted bonnet , outside screw & rising stem; size: 4 nb x 300#; ends: flanged ( raised face serrated ) body bonnet joint: bolted bonnet , stud bolts - full threaded ansi b 1 . 1 , nuts - heavy hex . thread as per ansi b 1 . 1 moc: ( 1 ) body & bonnet: astm a 216 gr wcb , ( 2 ) stem: astm a182 gr . f6a , ( 3 ) seat ring: astm a 105 + hardfaced with stellite #6 ( api trim #5 ) , ( 4 ) disc / wedge ( flexible ) : astm a 216 gr wcb + hardfaced 13% cr steel ( api trim #5 ) , ( 5 ) bonnet gasket: spirally-wound ss 304 with graphite filler , ( 6 ) yoke sleeve ( bush ) : a439 type d2 / bronze ( 7 ) gland & gland bush: a276 type 410 . ( 8 ) gland flange: astm a 105 / a216 gr . wcb ( 9 ) stem packing: graphite with braided end rings , ( 10 ) back seat: hardfaced 13% cr steel ( api trim #5 ) , ( 11 ) bonnet bolts & nuts: astm a 193 gr b7 & astm a 194 gr 2h , ( 12 ) gland bolts / eye bolts & nuts: astm a 193 gr b7 & astm a 194 gr 2h; ( 13 ) hand wheel : ductile iron . compliance standards: design standard: api 600; face to face dimensions: as per ansi b16 . 10; flange drilling: as per ansi b 16 . 5; pressure & temperature rating: as per ansi b 16 . 34; inspection and testing as per api 598; note: 1 . hydrostatic test certificate ( as per api 598 ) to be furnished alongwith supply . 2 . valves to be supplied duly painted by al . paint of min . 40 micron dft & packed with proper flange cap protector . 3 . mtc from nabl approved laboratory to be furnished along with supply . , gate valve solid wedge rising stem material-body-a216 wcb / 182f6 300 lbs , flanged raised face ansi b16 . 5 size 6 as per api 600 , stelli .