supply of gate valves , supply of items as per following specifications , carbon steel gate valve size: 6 inch nb x 600# ends: flanged flange face: raised face with serrations constructional details: 1 . body: cast 2 . bonnet to body connection: bolted 3 . operation: handwheel operated with rising stem 4 . stem & yoke type: outside stem & yoke 5 . wedge type: parabolic material of construction: 1 . body: astm a216 gr . wcb 2 . body seat ring: a 216 gr . wcb+13%cr , 3 . wedge: a 216 gr . wcb+13%cr , 4 . stem: astm a479-410-2 5 . stem packing: graphite 6 . fasteners: a193 gr . b7/a194 gr . 2h 7 . bonnet gasket: spiral wound ss304 with graphite filled applicable standards: 1 . pressure rating: asme b 16 . 34 2 . valve inspection & testing: api 598 3 . dimensional standard: asme b 16 . 10 4 . flange design: asme b 16 . 5 notes: 1 . copper and copper alloys are not permitted . 2 . material test certificates & hydro test certificates of valves shall be furnished along with supply . 3 . valve to be supplied duly painted by aluminium paint of min . 40 micron dft & packed with proper end cap at ends . , gate valve 4 , 600 # , body & bonnet a 216gr wcb seat 13% cr steel ( stellited , wedge 13% cr steel ( solid ) packing graphited asbestos , ends flanged to ansi b16 . 5 , design as per api 600 , testing as per api 598 . ibr approved with ibr certificate