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About to Start Buidling A 2.2Kg Roaster
staticnetwork
They are working me up a quote, I haven't seen it yet. He did ask what pressure I want to operate at. I'm not certain about a specific pressure.
 
allenb
If you'll be using propane with a proportional solenoid then I'd recommend around 5 psi to the burner for the lowest firing rate.

If you'll be using propane with a maxitrol selectra valve then there's two options for maximum outlet pressure, one ouputs a maximum of 7" WC and the other is 11".

So, you'll need to pin down what kind of valve you'll be controlling your roaster with before you'll be able to tell them what pressure you'll be providing the burner.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
staticnetwork
After some back and forth with Polidoro USA they informed me that they won't sell me any parts because they said they only sell as an OEM vendor. So, unless I'm buying a large quantity of burners they won't talk to me. Any other ideas of an easy off the shelf propane burner system?
 
allenb
Sorry to hear that they have stopped selling retail. I had heard such good feedback from others on quality.

Give these guys a call to see if they would be able to accommodate your needs in building one of their custom pipe burners for you in shorter lengths than they show on their site.

https://tejassmok...Burners/24

They sell the cast iron venturi/jet assemblies (HPGX-1) further down the page, with their burners or separately as well. You would need to do a twin pipe assembly or two singles to get the BTU's needed in the length you need. You will need to be able to tell them what pressure range you'll be sending the burner and max BTUs needed for them to select an orifice. No guarantees but is worth checking it out. You should offer to send them a drawing of the twin pipe assembly as you would envision it fitting into your design. They can tell you how much unperforated straight pipe will be needed prior to the perforated portions.

Unfortunately, I've never heard any feedback from any of our members on if they have solutions for us roaster builders and what kind of customer service they offer.

Good luck!

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
staticnetwork
Ok, here is an update...

Even though the local Polidoro contact in the US told me they wouldn't sell retail. Someone else from Italy was in the email thread and they responded (Irene Pietribiasi i.pietribiasi@polidoro.com). She sent me a diagram of a burner made just for my roaster. They will custom make my burner and ship it to me for a total of $160. I'll post a couple of the images to show you all what they came up with.
 
staticnetwork
Here is the quote and the images of the burner. It looks like they listed Natural Gas . I wonder if I should ask them to prepare this for propane or if I could modify this myself?
staticnetwork attached the following images:
burner_quote.png burner_image_2.png burner_image.png
 
allenb
Wow, your persistence paid off! While the shipping is a little harsh, the savings in labor and design headaches will more than justify it.

My vote is to have them prepare it for propane as you will not know what that entails in DIY time/$ until you could see it in person. You'll also need to tell them what pressure range you'll be sending it to make sure the orifices are sized right.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
staticnetwork
They have the sizing of this based on my 14" length and 20K BTU. I don't know about the pressure though.
staticnetwork attached the following images:
burner_4.png burner_3.png
 
allenb
If you don't specify what pressure propane you'll be using with the burner they will more than likely have it set to work with low pressure (7-15" water column) which should be fine as long as you're good with using something like the Maxitrol Selectra valves which are great valves. OTOH, if you end up wanting to use a needle valve or proportional solenoid then you'll have to order additional jets with smaller orifices which may be available here in the states unless they're a non-standard design.

I would ask them if the jets are typical standard issue or not.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
allenb

Quote

If you don't specify what pressure propane you'll be using with the burner they will more than likely have it set to work with low pressure (7-15" water column) which should be fine as long as you're good with using something like the Maxitrol Selectra valves which are great valves


In the last post I wrote 7 to 15" water column by mistake. I should have written 1 to 11" water column if they're setting it up for low pressure propane.

Allen
Edited by allenb on 03/08/2016 9:01 PM
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
hbboyd
Allen, can you expand more on the Maxitrol Selectra valves?
 
allenb
Take a look at these threads and you'll see a pretty good discussion on the selectra on an Ambex YM5. They're still available from Maxitrol and are fairly reasonable

http://forum.home...post_56649

http://forum.home...post_44911
Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
staticnetwork
I asked about the Propane and Natural Gas and it appears that they are going to send me both at no additional charge.

606.1326.05 injectors ?0.77 for LPG assembled + injectors ?1.25 for nat gas + gaskets 028.0001.00
burner 103.3284.00 5.3kW + injector holder 320.0025.00 + injector ?1.15 for LPG + injector ?1.90 for nat gas
 
staticnetwork
They know that I am using propane supplied by 5 gallon tanks they will send me what works for that.
 
dmccallum

Quote

staticnetwork wrote:

Ok, here is an update...

Even though the local Polidoro contact in the US told me they wouldn't sell retail. Someone else from Italy was in the email thread and they responded (Irene Pietribiasi i.pietribiasi@polidoro.com). She sent me a diagram of a burner made just for my roaster. They will custom make my burner and ship it to me for a total of $160. I'll post a couple of the images to show you all what they came up with.


I have also had luck recently getting response and burner diags from Polidoro in Italy. I inquired via the regional email address on their website.
 
snwcmpr
Great thread. A good read.
--------------
Backwoods Roaster
"I wish I could taste as well as I wish I could roast."

As Abraham Lincoln said "Do not trust everything you read on the internet".
 
staticnetwork
If I go with the NP Burner Style which is the style I've posted
it will be 10,5-11kW = 39.700Btu. She said that is the probat style.

nat gas injectors ?1.25 - pressure at the injector 4" - 11,2kW=42.330Btu
LPG G31 injectors ?0,77 - pressure at the injector 10,5" - 10,2kW=38.560Btu

They said that I will need the regulator valve.
staticnetwork attached the following image:
burner_image_2_1.png
 
dmccallum

Quote

staticnetwork wrote:

If I go with the NP Burner Style which is the style I've posted
it will be 10,5-11kW = 39.700Btu. She said that is the probat style.

nat gas injectors ?1.25 - pressure at the injector 4" - 11,2kW=42.330Btu
LPG G31 injectors ?0,77 - pressure at the injector 10,5" - 10,2kW=38.560Btu

They said that I will need the regulator valve.


I steered away from these NP burners on account of their total overall height vs a tubular burner, and also the BTU output was excessive. 20K BTU is going to be more than enough for a circa 2KG roaster ?
 
staticnetwork
I got my burner today!
 
allenb
Can you shoot us a photo of it?

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
staticnetwork
Here is the burner:
https://flic.kr/p/QHhfGe
https://flic.kr/p/QQgpnq
Edited by staticnetwork on 01/03/2017 9:00 PM
 
staticnetwork
I had a local machine shop craft a face plate diagram.
staticnetwork attached the following image:
roaster_faceplate.jpg
 
staticnetwork
I'm having my machine shop craft the parts now. It's been a while...

He is planning on using a .25" thick pipe that is 10 3/4" in diameter and will be 14" long for the drum. My concern is that the burner I have is only 6" long and has about 100 orifices and it will not be long enough for an even roast. I'm thinking about putting a sheet of metal between the drum and the burner OR making my own 14" tube burners. What do you all think?
 
Ringo
I think that would work great, thinking I need to look for just such a burner for my drum. A burner you can control over a wide range of heat is more important than a longer burner i believe.
All you need in life is ignorance and confidence, and then success is sure. Mark Twain
 
staticnetwork
I've finally picked up the pipe to use as a drum. It's 1/4" mild steel, 12" in diameter and 14" long. We are just now starting the build.
 
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