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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(1) 316 SS
9 DISC HOLDER(1) 316 SS
10 GUIDE Brass
11 STEM GUIDE 316 SS
12 GUIDE RING 316 SS
13 NOZZLE RING 316 SS
14 UPPER SET SCREW 304 SS
15 LOWER SET SCREW 304 SS
16 SPRING SEAT Carbon Steel
17 SPRING Up to 450℉ Carbon Steel(2) / Stainless Steel
451F to 1000℉ Alloy Steel(3)
18 ADJUSTING SCREW 316 SS
19 LOCK NUT 304 SS
20 BALL 440C SS
21 DISC PIN 304 SS
22 STUD BOLT A193 Gr. B7
23 NUT A194 Gr. 2H
24 CAP GASKET Soft Iron
25 UPPER SET SCREW GASKET Soft Iron
26 LOWER SET SCREW GASKET Soft Iron
27 BODY GASKET Soft Iron
28 DRAIN PLUG Steel
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