Thermo Grade Traps

Mr Steam

Has anyone seen these steam traps before?

EdTheHeaterMan

My first encounter with this brand of trap has been seeing here in this Discussion. Maybe another member has more information.

I am wondering why you have asked such a complaisant question. Are you taking a survey of members who have seen them? OR is there another reason you ask?

Steamhead

Those Thermograde Autovalves are at least 100 years old. They may be old enough that they use carbon posts or floats instead of expanding bellows or diaphragms to close the trap when steam gets there.

Here's some old Thermograde literature:

https://ia800603.us.archive.org/16/items/TheThermogradeSystemOfSteamHeatingASemi-automaticMethodOfHeat/Cca51070ThermogradeValveCo..pdf

There are a couple more Thermograde threads on here:

https://forum.heatinghelp.com/discussion/comment/1584974#Comment_1584974

https://forum.heatinghelp.com/discussion/comment/791585#Comment_791585

and this one, a listing of more-recently-encountered Vapor systems:

https://forum.heatinghelp.com/discussion/178152/a-listing-of-vapor-systems-that-dont-yet-appear-in-lost-art

How about some pics of the rest of the system?

reggi

@Steamhead .... Ever go to a job and see something like this ? 

Steamhead

reggi said:

@Steamhead .... Ever go to a job and see something like this ? 

No, but it's probably a carbon-post trap.

reggi

Steamhead said:

@Steamhead .... Ever go to a job and see something like this ? 

No, but it's probably a carbon-post trap.

I think it's a pre-patent version from 1901-03 as the one picture in your linked book "Thermograde system of steam heating" shows the more familiar version: