API 600, GATE VALVE, TRIM 8 1

[kissjxp]

API 600, GATE VALVE, TRIM 8

What does trim 8 mean?

The wedge surface should be 13Cr and base metal equal to or better than body materials; The body seat surface should be hard faced and base metal equal to or better than body material. Am I right?

Thanks.

 

[nickelkid]

Yes, you are right.

trim
Part number Material Brinell hardness

Stem 1,4-8A 13Cr 200 HB min.275 HB max.

Seat 8 or 8A 13Cr/HF 250 HB min./350 HB min.
Surfaces