Gated valve trim

[Maxvolonte]

Hi colleagues. I was wondering what HF letters on the identification plate of a gate valve means. Is it stellite gr6, Co CrA? The Stem is 13 % cr, but seat and wedge only have this HF identification letters. Any advice will be appreciated.

 

[mk3223]

HF is "hardfaced" for the valve trim.

Link for reference

https://www.911metallurgist.com/blo...-of-Hardfaced-Coatings-for-Industrial-Use.pdf