Steam trap conversions

aircooled81

Hoffman 17C's, think some have been converted to barnes and jones with the 122 or 3500 cap.
Anyone have an opinion on which basket works better, When you need to rebuild?
Barnes and Jones sight is a bit confusing, does the 3500 or 122 require removal of the 17c's seat?

Fred

@Sailah from Barnes and Jones posts on this site and I'm sure he can answer any question you have about those. If he doesn't respond shortly, you may want to PM him. He is usually very responsive.

Sailah

The Hoffman 17c came in 2 varieties. Old & new style. The old style are conical shaped like an ice cream cone and do not require a new cover, you would reuse the existing cover. The new style Hoffman 17C (Bear Trap) are flat like a hockey puck and do require a new cover, PN 3500C.



Both Hoffmans require you to remove the seat which is a 3/4" hex. Both also use the same cage unit which is PN 3500. If you already have a cover from us stamped 3500 then you do not need a cover you just need a 3500 to renew the trap.

The Barnes and Jones 122A is a different trap entirely, made by us. The correct cage unit for it is PN 1721 and does not require a new cover or seat removal. The covers do not interchange between a 122A and a 17C.

Your question about which basket is better I do not understand. Functionally the cage units are identical in performance from a 122A to a 17C. They use the same diaphragm, same calibration, same testing etc. One just fits the 17C, one fits the 122A. Call me if you need to.

Peter

aircooled81

@Sailah
Thank you Peter. I had done a bunch of searching last night, what you were able to explain above so well.
Regarding which is better, I just wanted to know if rebuilding a hoffman with barnes and jones basket was an upgrade, same quality or benefit. I think you explained it well enough to me here though.
Thank you very much for posting the pics, and a hockey puck, spot on description!
It took a while for me to figure out, 17C's can be rebuilt to use a barnes and jones basket, if you replace the cover. The confusion was the cover being stamped barnes and jones 3500, while the trap looked just like a hoffman 17c.
Fantastic reply, can't thank you enough

gerry gill

aircooled81 said:

@Sailah
Thank you Peter. I had done a bunch of searching last night, what you were able to explain above so well.
Regarding which is better, I just wanted to know if rebuilding a hoffman with barnes and jones basket was an upgrade, same quality or benefit. I think you explained it well enough to me here though.
Thank you very much for posting the pics, and a hockey puck, spot on description!
It took a while for me to figure out, 17C's can be rebuilt to use a barnes and jones basket, if you replace the cover. The confusion was the cover being stamped barnes and jones 3500, while the trap looked just like a hoffman 17c.
Fantastic reply, can't thank you enough

if you replace the guts of a modern hoffman 17c with the barnes and jones 3500 cage unit you will see a significant improvement in the traps performance as far as its ability to move air out of the radiator quickly.