supply of valves , supply of items as per following specifications , gate valve 2#150 , material:body-a105/wcb seat ring a182f6 stellited sc & stem-a182 gr f6 . body to bonnet connection bolted , end connection: flanged , gland packing pure graphoil , testing as perapi 598 , disc shall be harder than seat , copper & copper alloys not allowed , valve should be provided back seating arrangement . , gate valve solid wedge rising stem material of body astm a-105 wcb tri m a 182 f6 flanged end flat faced as per api 600 150 lbs size65 mm , 3 gate valve , 150# , flanged as per ansi b16 . 5 , bolted bonnet , o . s . & y pe , hand wheel operated , body: a216 gr wcb /trim: aisi 410/13% cr , manuf acturing as per: api 600 & testing as per : api 598 , gate valve straight-rising stem , flexible disc , m aterial body: astm a216wcb/disc a182f6 , ansi b16 . 5 , flangrd-rf , #150 lb s , size:4 . , gate valve solid wedge rising stem material body-a216 wcb/trim aisi 4 10 , 13%cr ss 150lbs flanged raised face ansi b16 . 5 size 6 . as per 600 , gate valve , rising stem , flexible disc , material:body astm a216wcb , disc-a 216 wcb with 13% chrome facing , size 8 , #150 , end connection:flanged ised face as per ansi b16 . 5 . design standard:api 600 , inspection & testi ng as per api 598 .