Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
all-vac steam control system
nicholas bonham-carter
Member Posts: 8,578
many early systems worked on the vacuum principal.in the days of coal, the fire could die down [but not be extinguished], and the heat loss in the radiators would therefore slightly exceed the btu output of the boiler.
the result was a very low steam pressure in the pipes below atmospheric which kept low temperature steam filling the system.even when running full tilt, the boiler might not go above a few ounces of pressure.
now-a-days it is challenging to devise a gas, or oil burner with enough modulation to mimic the character of the coal fire, but not impossible.
i would suggest that you buy dan's steam book on this site which goes into more detail than i could ever type.
are you restoring this system, or just interested in the history?
many companies were only active in a certain region of the country but all the principles of operation were similar.--nbc
the result was a very low steam pressure in the pipes below atmospheric which kept low temperature steam filling the system.even when running full tilt, the boiler might not go above a few ounces of pressure.
now-a-days it is challenging to devise a gas, or oil burner with enough modulation to mimic the character of the coal fire, but not impossible.
i would suggest that you buy dan's steam book on this site which goes into more detail than i could ever type.
are you restoring this system, or just interested in the history?
many companies were only active in a certain region of the country but all the principles of operation were similar.--nbc
0
Comments
-
steam
I am looking for information on a steam control system installed in an old high rise building.The name of the system is All- Vac Steam Control System made by Bessemer Building, It looks like the intent was to run the supply and return in a vaccuum.Any info or input would be appreciated0 -
That sounds a lot
like the Dunham Vari-Vac. Can you post some pics of the various parts and controls of he system?
To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"0 -
AKA
also known as subatmospheric operation. The lighter the load on the system the greater the vacuum drawn on the system. Cool stuff. Always wondered how those selective controllers worked. Seems to me that such a system from those days would be relatively high maintenance. Today, tho, the sensors would be tiny and the entire control system would be computerized and probably the size of your typical tekmar control. A fully up to date interpretation of subatmospheric steam would be fascinating and quite practical.Terry T
steam; proportioned minitube; trapless; jet pump return; vac vent. New Yorker CGS30C
0 -
Sounds like
we all should make a project out of it.....
To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"0 -
vacuum project
well--when do we start?
this will get us all ready for outfitting the space station with 1-pipe steam--if our tools don't "float off".
that will now become the new apprentices excuse for missing tools!!--nbc0
This discussion has been closed.
Categories
- All Categories
- 86.3K THE MAIN WALL
- 3.1K A-C, Heat Pumps & Refrigeration
- 53 Biomass
- 422 Carbon Monoxide Awareness
- 90 Chimneys & Flues
- 2K Domestic Hot Water
- 5.4K Gas Heating
- 100 Geothermal
- 156 Indoor-Air Quality
- 3.4K Oil Heating
- 63 Pipe Deterioration
- 916 Plumbing
- 6K Radiant Heating
- 381 Solar
- 14.9K Strictly Steam
- 3.3K Thermostats and Controls
- 54 Water Quality
- 41 Industry Classes
- 47 Job Opportunities
- 17 Recall Announcements