API Std 600 - Trim Number Chart

Written by Jerry Ratzlaff. Posted in American Petroleum Institute

American Petroleum Institute (API)

standards

  • API Std 600 - Standard for Steel Gate Valves, Flanged and Butt-welding Ends, Bolted Bonnets
API

Trim

Number

MaterialSeatDiscBackseatStemNotes
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 Seats 750 BHN min.
5 Hardfaced Stellite Stellite 410 410 -
5A Hardfaced Ni-Cr Ni-Cr 410 410 -
6 410 and Cu-Ni Cu-Ni Cu-Ni 410 410 -
7 410 and Hard 410 Hard 410 Hard 410 410 410 Seats 750 BHN min.
8 410 and Hardfaced Stellite 410 410 410 -
8A 410 and Hardfaced Ni-Cr 410 410 410 -
9 Monel Monel Monel Monel Monel -
10 316 316 316 316 316 -
11 Monel and Hardfaced Stellite Monel Monel Monel -
12 316 and Hardfaced Stellite 316 316 316 -
13 Alloy 20 Alloy 20 Alloy 20 Alloy 20 Alloy 20 -
14 Alloy 20 and Hardfaced Stellite Alloy 20 Alloy 20 Alloy 20 -
15 304 and Hardfaced Stellite Stellite 304 304 -
16 316 and Hardfaced Stellite Stellite 316 316 -
17 347 and Hardfaced Stellite Stellite 347 347 -
18 Alloy 20 and Hardfaced Stellite Stellite Alloy 20 Alloy 20 -