That is the VR DD Class engine spec. I'd send it to you but it'd take me about 4 hours for TS12 to start up and be ready to actually do anything. (It's built-in to TANE, hence why it's not in any pack.) Therefore, there are two choices by which you can fix this:
1) Replace it. No. 25's a pretty standard small 4-6-0, IIRC the operating pressure is around 180 psi. Should be able to find a decent alternative without too much trouble.
2) Buy Zec's wonderful DD packs from the N3V store.