No.	Parts	Standard material	Acidic environment	Low temperature environment
1	Body	ASTM A216 WCB	ASTM A216 WCB	ASTM A351 LCB
2	Seat	ASTM A105N+ENP	ASTM A105N+ENP	ASTM A352 LF2+ENP
3	Ram	ASTM A105N+ENP	ASTM A105N+ENP	ASTM A352 LF2+ENP
4	Stem	ASTM A182 F6a	ASTM A182 F6a(NACE)	ASTM A182 F6a
5	Gasket	SS304+Graphite wrap pad/RTJ ring	SS304+Graphite wrap pad/RTJ ring	SS304+Graphite wrap pad/RTJ ring
6	Screw bolt	ASTM A193 B7	ASTM A193 B7	ASTM A320 L7
7	Nut	ASTM A194 2H	ASTM A194 2H	ASTM A194 7
8	Toggle	ASTM A276 410	ASTM A276 410(NACE)	ASTM A276 316
9	Packing	Graphite	Graphite	Graphite
10	Screw bolt	ASTM A193 B7	ASTM A193 B7	ASTM A320 L7
11	Nut	ASTM A194 2H	ASTM A194 2H	ASTM A194 7
12	Support	Carbon steel	Carbon steel	Carbon steel
13	Bolt	ASTM A193 B7	ASTM A193 B7	ASTM A320 L7
14	Bearing	Carbon steel	Carbon steel	Carbon steel
15	Stem nut	ASTM A439 D-2	ASTM A439 D-2	ASTM A439 D-2
16	Bearing housing	Carbon steel	Carbon steel	Carbon steel
17	Gear wheel	Ductile iron	Ductile iron	Ductile iron
18	Nut	Carbon steel	Carbon steel	Carbon steel
19	Dust cover body	Polycarbonate	Polycarbonate	Polycarbonate
20	Dust cap	RPTFE	RPTFE	RPTFE
21	Spring	17-7PH/InconelX-750	17-7PH/InconelX-750	17-7PH/InconelX-750
22	O-ring	VITON A	VITON A	HNBR
23	O-ring	VITON A	VITON A	HNBR
24	Oil cup	Carbon steel	Carbon steel	Carbon steel
25	Grease injection valve	Stainless steel	Stainless steel	Stainless steel
26	Bolt	Stainless steel	Stainless steel	Stainless steel
27	Blow-down valve	Stainless steel	Stainless steel	Stainless steel
28	Bolt	Stainless steel	Stainless steel	Stainless steel
29	Dogtag	SS304	SS304	SS304
30	Rivet	SS304	SS304	SS304
31	Bonnet	ASTM A105N	ASTM A105N	ASTM A350 LF2

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