API 600 Trim Chart

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API 600 trim number chart for trim parts: stem, back seat, disc/wedge, seat surface of gate, globe and check valves. API 600 valve trim available from trim no. 1 to 18. Trim No. 1, 5, 8 are the most frequestly used for no-corrosion service. 

Trim materials such as discs, seats, stems, back sheets, and sleeves are grouped together and assigned one number called trim number. This defines the material grade for each component. 

Valve trims are selected based on the service conditions like the temperature, pressure, chemical composition, flow velocity, etc. . The sustainability of the material, to resist corrosion can be determined by corrosion resistance tables and selecting accordingly from them.

How to select valve trim from API 600 trim number chart?

For example:

Trim No. 1: Gate Valve, Body: A216 WCB, Disc: A216 WCB+13Cr, Seat: A105+13Cr, Stem: A276 410/A182 F6A

Trim No. 5: Gate Valve, Body: A216 WCB, Disc: A216 WCB+STL, Seat: A105+STL, Stem: A276 410/A182 F6A

Trim No. 8: Gate Valve, Body: A216 WCB, Disc: A216 WCB, Seat: A105+STL, Stem: A276 410/A182 F6A

Trim No. 10: Gate Valve, Body: A351 CF8M, Disc: A351 CF8M, Seat: A351 CF8M, Stem: A182 F316

API 600 Trim Chart

Trim No. Material Seat Disc Backseat Stem Notes
1 410 13Cr 13Cr 13Cr 410  
2 304 304 304 304 304  
3 F310 310 310 310 310  
4 Hard 410 Hard 410 Hard 410 410 410 seats 750BHN Min.
5 Hardfaced Stellite Stellite 410 410  
5A Hardfaced Ni-Cr Ni-Cr 410 410  
6 410 and Cu-Ni Cu-Ni 410 410 410  
7 410 and Hard 410 Hard 410 Hard 410 410 410 seats 750BHN 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  

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