The Email attached is the first check of the manual valves from K. Saovalak, It was mention on the butterfly valve the model is IFF81 of HH valve.
When I check form Emerson link it was now change to ITF81 model which is a triple Eccentric butterfly valve Ansi 150.
But how ever I believed there is no problem on this as long as the rating and size are the same because as what I understand the feature of the triple offset / triple eccentric BF valve is to eliminate friction, galling and wear generated at the sealing surface during operation and also provide bubble tight shut-off on high pressure and temperature.
Hope this will help.
Please Note:
On our MTO we have: (Module)
2 item for 4”
4 item for 6”
2 item for 12”
On our MTO we have: (Interconnecting large bore)
2 item for 4”