Need Help for 2 pipe steam rad valve parts

JUGHNE

I have a 1954 school with 2 pipe steam convectors.  Changing out trap elements Hoffman # 17C & 8C (thought to be the originals)

The problem is with rad valves that are Hoffman model 180 (obsolete).  Most do not function and cause problems balancing the heating.

There are eleven 1 1/4" angle valves that should be rebuild.  The 185 models are a replacement but very difficult to change the bodies in this situation.

Is there a source for the replacement "Hoffman Specialty Service package # 601099" that includes bonnet assembly with all moving parts.

There are orifices in each valve union/spud; they feel like approx. 3/8 to 1/2" holes.  Is it a good guess that even though the traps probably failed that the orifice has kept most of the steam out of the returns??

Thanks for any help and advice!!

Steamhead

Try Tunstall

they either have them or can make them.