API 600 Trim Number Chart

Trim No. Material Seat Disc Back Seat Stem
1 410 410 410 410 410
2 304 304 304 304 304
3 F310 310 310 310 310
4* Hard 410 Hard 410 Hard 410 410 410
5 Hard Faced Stellite Stellite 410 410
5A Hard Faced Ni-Cr Ni-Cr 410 410
6 410 and Cu-Ni 410 410 410 410
7* 410 and Hard 410 Hard 410 Hard 410 410 410
8 410 and Hard Faced Stellite 410 410 410
8A 410 and Hard Faced Ni-Cr 410 410 410
9 Monel Monel Monel Monel Monel
10 316 316 316 316 316
11 Monel and Hard Faced Stellite Monel Monel Monel
12 316 and Hard Faced Stellite 316 316 316
13 Alloy 20 Alloy 20 Alloy 20 Alloy 20 Alloy 20
14 Alloy 20 Stellite Alloy 20 Alloy 20 Alloy 20
15 304 and Hard Faced Stellite Stellite 304 304
16 316 and Hard Faced Stellite Stellite 316 316
17 347 and Hard Faced Stellite Stellite 347 347
18 Alloy 20 and Hard Faced Stellite Stellite Alloy 20 Alloy

* The seats shall be 750BHN Min. 

E.g.:

1) Gate Valve , WCB body, API 600 Trim no. 5 means the seat: A105+Stelite, disc: WCB+Stelite, Stem: ASTM A182 F6a

2) Class 150 Gate Valve,  WCB body, API 600 Trim no. 1 means the seat: A105+13Cr, disc: WCB+13Cr, Stem: ASTM A182 F6a

3) Carbon Steel Gate Valve, WCB body, API 600 Trim no. 8 means the seat: A105+Stelite, disc: WCB+13Cr, Stem: ASTM A182 F6a

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