TRV s on 2 pipe steam

Charlie from wmass

Seems like the system is working ok just needing some basic maintaince, But I do have a question. The system is a 2 pipe steam with both fresh air heating units with fans and coils and cast iron rads. The rads all have TRVs on the supplies. The thing is they are all 3/4 " and the original supplies to the rads were 1 1/4". WHat can I expect from this set up. WE have very few TRV steam systems around here. Especially 2 pipe steam ones.