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Old 04-02-2020, 11:05 AM
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Default Large Stack Damper Build

I was told yesterday, that we have a job coming up, where I’m going to have to make a large 32”+ diameter multi-blade round stack diameter. It has to be roughly 12” high, have matching companion flanges and positive shut-off. The flanges and body has to be 1/4” thick and the damper blades have to be stainless steel, along with the blade mounting shaft. With an electro-pneumatic actuator, with end switches and digital position readout. I’m still waiting for the actual prints, so far I’ve been told the damper has to be 32”, 34” and 37” in diameter.
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Last edited by platypus20; 04-02-2020 at 11:36 AM.
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Old 04-02-2020, 11:08 AM
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Sounds like a nice challenging job. Hopefully the prints spell out the fine details that actually work, and you do not have to re-engineer on the fly, unless you really like doing that. Guess will be a couple weeks in the home shop.


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Old 04-02-2020, 11:39 AM
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Interesting...the ones I was to outfit angular encoders to (for positional feedback) all appeared to be catalog items.
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Old 04-02-2020, 12:11 PM
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Originally Posted by digger doug View Post
Interesting...the ones I was to outfit angular encoders to (for positional feedback) all appeared to be catalog items.
This job is an example of too many cooks, there are 3 engineering companies, the customer’s engineers and a design-build group, too many ideas, too many wants vs actual needs and most of all too many voices.

The last comments I heard were the 3 boilers, at about $1.2 million, with $1.7 million worth of control and instrumentation, this is not final, but still in the early planning/design stages. The boiler side of the equation is pretty solid, the control/instrumentation side is pretty fluid, it would not surprise me the number goes over $2 million.
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Old 04-02-2020, 12:20 PM
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Damn! You get all the fun jobs!
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Old 04-02-2020, 01:27 PM
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Quote:
Originally Posted by platypus20 View Post
This job is an example of too many cooks, there are 3 engineering companies, the customer’s engineers and a design-build group, too many ideas, too many wants vs actual needs and most of all too many voices.

The last comments I heard were the 3 boilers, at about $1.2 million, with $1.7 million worth of control and instrumentation, this is not final, but still in the early planning/design stages. The boiler side of the equation is pretty solid, the control/instrumentation side is pretty fluid, it would not surprise me the number goes over $2 million.
https://www.tecnologperu.com/

WooHoo !
https://www.tecnologperu.com/tecnolog.html
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Old 04-02-2020, 04:04 PM
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Interesting, but the this customer surely wouldn’t buy a foreign sourced boiler


They already speced the boiler brand, type, size and fuel requirements, we just settled on the burner type and manufacturer, but as I said, the control and instrumentation choices are still being hotly debated.
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Old 04-02-2020, 05:15 PM
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So, just build the damper to the largest spec with trim-to-fit dotted lines sort of boilers.com type stuff
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Old 04-02-2020, 06:16 PM
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Quote:
Originally Posted by platypus20 View Post
Interesting, but the this customer surely wouldn’t buy a foreign sourced boiler


They already speced the boiler brand, type, size and fuel requirements, we just settled on the burner type and manufacturer, but as I said, the control and instrumentation choices are still being hotly debated.
"You-Would-Tink" that they would buy a complete package from one manuf.

"Foreign sourced" I have a pix of the factory when our guys went there....it is a 3 sided building, much like an Amish sawmill.
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Old 04-02-2020, 07:28 PM
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Quote:
Originally Posted by digger doug View Post
"You-Would-Tink" that they would buy a complete package from one manuf.

"Foreign sourced" I have a pix of the factory when our guys went there....it is a 3 sided building, much like an Amish sawmill.
Once they get above a certain size. There are no more complete package boilers, most watertube boilers, the vessel is made by one company and the burner by another company, each specializing in their fields. Also at this point the control systems, start to become custom packages for a specific facility. The smaller boilers are complete packages, and are or could be made by one manufacturer. When the big units get to the customer, they usually arrive as as an assembled unit, the burner manufacturer ships the burner to the boiler manufacturer, they assemble the pieces, then test fire it, then when approved, it’s shipped to the customer. Sometimes, everything, because of the size, is assembled on site, the boiler vessel (called field erection), the the burner and other equipment and piping is installed, then fired for the first time, on site.
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