Best Of
Re: prebuilt pump headers for wall hung boilers
There are a few out there like RHT and FloorHeat that offer one-size-fits-all type units with no reference to the actual loads and flow rates. I custom build them to the application in my shop and have them all over the country, but am often a little more expensive than the others due to the custom nature. I'd be happy to discuss your application if you'd like, www.groundupradiant.com
GroundUp
Re: Looks like this place had an Illinois Engineering Co. Vapor system
At our old shop we had 2 T87s to run the boiler. One was set at 60 degrees and went straight to the boiler. That was the night stat.
The other T87 set at 70 ran through a time clock to the boiler. I guess they had a old time clock kicking around instead of buying a day/night stat.
Re: New press
^^ ^^
What Ed said.
The barrel grip may get into some tight places better, but the pistol grip is more ergonomic.
Either way, you have to think through your piping layout so that you don’t press yourself into a corner.
Ironman
Re: Gas valve/solenoid stuck open on old Janitrol boiler
Oh, are there thoughts about this!
I'm in the reliability over efficiency camp but I have to admit that, with a little creative accounting, the efficiency camp looks pretty good. 😉
ratio
Re: 1920s Steam System - How to Add Main Vents
This statement is also system dependent.
" The amount of venting depends on the ability of the boiler to provide steam. When pressure builds up before the main is hot all the way around, then you know you need more venting. "
My system never goes over 2 inches of water column regardless if the main vent is used or valved off. The predominant benefit (main vent versus no (or poor) main venting) is with a hot main the steam will propagate faster, purging the air out as fast as possible, filling the main with steam as fast as possible.
You want enough venting so when the mains are hot the steam will fill the main as fast as possible. There is a point of diminishing returns. Since even with a hot main the steam will only move so fast.
109A_5
Re: Gas valve/solenoid stuck open on old Janitrol boiler
vent dampers save very little. Some say 1-2%
Re: calculating Nozzle flow rate
your absolutely right, I was misreading the formula and getting the square root last.
Thank you!
Robert_H
Re: Issues with steam system after work completed
if there were wet returns returning from the far end of the mains it is a parallel flow system. the mains are sloped away from the boiler and the wet returns bring the condensate back to the boiler. you have to replace the wet returns.
In theory you could slope everything toward the boiler and add drips before the boiler header to return the condensate but that wouldn't be practical because it would throw all of the pitch to the runouts to the radiators off, the mains are sized for parallel flow, not counter flow, you would essentially end up repiping the entire system.
mattmia2
Re: Gas valve/solenoid stuck open on old Janitrol boiler
I have several contractors coming out in the morning to give me quotes on replacement. It's off and there is no reason to run it since it's not the cold season yet. All is safe, thanks for your concern.
guitbox