I'd like to get some opinions on makes/models for a new F&T trap.
This is for a two pipe steam system running at 1-2 psi. There are crossover traps in place and working well. The mains all connect directly to the wet returns without vents. There is currently only one F&T trap at the end of the dry return next to the boiler. There is no condensate pump.
The current F&T trap is a Barnes & Jones No 397 (pic). I am sure it is very old and probably not working well.
However, the system does maintain a good vacuum between cycles, and so I'd like the replacement trap to also have an integrated check valve to allow for a vacuum as well as the elimination of air.
I have calculated the volume of steam mains at about 54 cubic feet. The house EDR is about 2,270.
Any recommendations are much appreciated.