Q647 pneumatic hard seal ball valve parts material: number Part Name Material grade Serial number Part Name Material grade Carbon steel stainless steel Carbon steel stainless steel GB ASTM GB ASTM GB ASTM GB ASTM 1 Bottom cover 25 A105 1Cr18Ni8Ti F304/F316/
F304L/F316L 17 Nut 45 A194-2H 0Cr18Ni A194-8M 2 Bottom cover screw 25CrMoA A193-B7 1Cr18Ni9Ti A193-B8M 18 Stud 35CrMoA A193-B7 1Cr17Ni2 A193-B8M 3 washer Metal clip graphite 19 Sphere key 40Cr 40Cr 1Cr17Ni2 1Cr17Ni2 4 Thrust bearing Metal clip PTFE 20 Upper stem 2Cr13 A276-410 1Cr18Ni9Ti
1Cr18Ni12Mo2Ti F304/F316/
F304L/F316L 5 Lower stem 2Cr13 A276-410 1Cr18Ni9Ti
1Cr18Ni12Mo2Ti F304/F316/
F304L/F316L twenty one Stem O-ring fluororubber fluororubber fluororubber fluororubber 6 Lower stem bearing Metal clip PTFE twenty two Stuffing box O-ring fluororubber fluororubber fluororubber fluororubber 7 washer Metal clip PTFE twenty three Upper stem bearing Metal clip PTFE 8 Sewage plug 2Cr13 A276-410 1Cr18Ni9Ti
1Cr18Ni12Mo2Ti F304/F316/
F304L/F316L twenty four Thrust bearing graphite 9 Valve body WCB A216-WCB ZG1Cr18Ni9Ti
ZG1Cr18Ni12Mo2Ti CF8/CF8M/
CF3/CF3M 25 Stem stuffing box 25 chrome A105 chrome 1Cr18Ni9Ti
1Cr18Ni12Mo2Ti F304/F316/
F304L/F316L 10 Seat 2Cr13 nitriding A276-410 nitriding 1Cr18Ni9Ti
1Cr18Ni12Mo2Ti F304/F316/
F304L/F316L 26 Stem packing graphite 11 Seat seal graphite 27 Packing gland WCB A216-WCB ZG1Cr18Ni9Ti
ZG1Cr18Ni12Mo2Ti CF8/CF8M/
CF3/CF3M 12 Seat support ring 25 chrome A105 chrome 1Cr18Ni9Ti
1Cr18Ni12Mo2Ti F304/F316/
F304L/F316L 28 Nut 45 A194-2H 0Cr18Ni A194-8M 13 Seat spring X-750 29 Stud 35CrMoA A193-B7 1Cr17Ni2 A193-B8M 14 Sphere 1Crl8Ni9Ti 304 1Cr18Ni9Ti
1Cr18Ni12Mo2Ti F304/F316/
F304L/F316L 30 Screw 35CrMoA A193-B7 1Cr17Ni2 A193-B8M 15 cap WCB A216-WCB ZG1Cr18Ni9Ti
ZG1Cr18Ni12Mo2Ti CF8/CF8M/
CF3/CF3M 31 support WCB 16 washer Metal clip graphite 32 key 40Cr 40Cr 1Cr17Ni2 1Cr17Ni2
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