Your thoughts on a new invention?

gerry gill

charles bryant had a device called a ''pressure tender'' that did just that..was used on bryant gas boilers about circa 1950 era..a customer has one thats still hooked up..i had to do research just to figure out what it was..charles bryant was a genius...

John Shea

just curious...

Why does a pressuretrol have to cut the burner in or out?

Why couldn't the burner gas pressure (or flame output) be automatically adjusted up or down based on the pressure in the boiler?

Is it even possible?

Possible benefits (if any)?
-efficiency

Maybe it would be to complicated/costly compared to the return?

I guess it would mean a re-invented burner control and pressuretrol.

Just thinking out loud.

jim_49

Pick yor Poison,SOOT OR BOOM ??

Unknown

John S. nothing new under the sun

Republic Gyroscopic burners back in the 1940's did just that in fact they had systems for steam, warm air and hot water.

John Shea

yeah, bryant...

think I've heard of him.

Wonder why they didn't continue with it. What has your experience been with it?

Thanks gerry.

Unknown

Gerry, we have several of

those still working up here in New England. The operation is very similar to the old Republic Gyroscopic burners.

John Shea

gotcha..

I'm certainly no expert on fuel combustion or heating for that matter, but I immediately got your point.

Also, 'SOOT' seems to me would make for poor efficiency?
Maybe that's why they aren't used extensively.

gerry gill

Hi Tim

you mean there are others like it out there...oh boy...I'd love to see this republic burner..but then again maybe i wouldn't...this trade can be very humbling..just when i'm comfortable enough to get cocky, life puts me in a boiler room where i'm looking sideways at something with my tongue hanging out and sweat forming as my brain fries dwelling on some antique...all the while some dead man in heaven laughing at me....

jerry scharf_2

variable speed air blower

I think your point is that the fuel/air mixture would change if you modulated the gas and no the air. Since modulating burners are done all the time, there is a solution. The most common one I see is a variable speed fan controlling the air, and the gas valve working on a fixed mixture ration based on venturi vacuum. The down side is that there is a great deal more complexity in the combustion system.

jerry

Rodney Summers

Republic Boilers

Hi Dave,
Where can you get parts for Gyroscopic control?


Thanks Ron

cell# 708-337-1002

Rodney Summers

Republic Boilers

Hi Dave,
Where can you get parts for Gyroscopic control?


Thanks Ron

cell# 708-337-1002

thp_8

Up front cost

Big boilers are done this way everyday. Most with 3 to 1 up to 5 to 1 turn down ratio. They throttle both air and fuel in respect to load. Kinda like the new little 90% condensing jobs.

Al Corelli

Amen to that.

Aidan (UK)

Why does a pressuretrol have to cut the burner in or out?

I used to have an occasional involvement with some Cleaver Brooks high-pressure steam boilers with modulating burners, which dated from the early '70s. They had pressure sensor control devices on which the resistance varied with the pressure. This was supposed to turn the burner down. I think it was a Honeywell control device, but can't recall the details.

Unfortunately the steam distribution system had been 'rationalized' over the years so that even one of the boilers was grossly oversized for the load. The pressure controls would overshoot, so the burners just operated as on/off devices. Even so, the service technician was astounded by the efficiency of the old C-B boilers; they performed better than most new boilers. He was wandering around showing the combustion analyser print-out to anyone who'd look at it.

Weezbo

And Well he should

thats what demands we do right and stay in the light