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No. Part Name Material
1 Body Up to 800℉ A216 Gr. WCB Carbon Steel
801℉ to 1000℉ A217 Gr. WC6 Chrome Moly Steel
2 BONNET Up to 800℉ A216 Gr. WCB Carbon Steel
801℉ to 1000℉ A217 Gr. WC6 Chrome Moly Steel
3 CAP Carbon Steel
4 UPPER STEM 304 SS
5 LOWER STEM(1) 316 SS
6 STEM JOINT 316 SS
7 NOZZLE 316 SS + Hard facing
8 DISC 316 SS
9 STEM GUIDE Brass
10 NOZZLE RING 316 SS
11 SET SCREW 304 SS
12 SPRING SEAT Carbon Steel
13 SPRING Up to 450℉ Carbon Steel(2) / Stainless Steel
451F to 1000℉ Alloy Steel(3)
14 ADJUSTING SCREW 316 SS
15 LOCK NUT 304 SS
16 BALL 440C St.St.
17 STUD BOLT A193 Gr. B7
18 NUT A194 Gr. 2H
19 CAP GASKET Soft Iron
20 SET SCREW GASKET Soft Iron
21 DRAIN PLUG Steel
22 BODY GASKET Soft Iron
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