Home Brew Forums > Home Brewing Beer > DIY Projects > Other > Drill bit orifice size
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Old 04-29-2012, 08:08 PM   #1
Nightbrew
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Default Drill bit orifice size

I need to drill out my orifices for my blichmann burners, going from high to low pressure lp. What size bit? Thanks for everyones help on this project I hope to post pics soon.


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Old 04-30-2012, 12:24 AM   #2
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For propane, I used 3/32". I'm quite happy with the results.
Use this chart for reference.


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Old 04-30-2012, 01:38 AM   #3
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You can do that, but Blichmann does make an orifice specifically for NG. I have used one of them and it works well.
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Old 04-30-2012, 02:08 AM   #4
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Sorry I should have been more clear, I am converting to low pressure propane. So does the 3/32 not sound like a good idea?
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Old 04-30-2012, 10:21 AM   #5
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That's my fault - I missed it. Yeah, drill it out then
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Old 04-30-2012, 06:39 PM   #6
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This may end up being a direction I go... I have the BG-14 High Pressure Burners as well. When changing to low pressure LP is the Orifice the only change made to the burners or does each and every port on the burner face need to be drilled out too?

Secondly, does the low pressure LP only save in fuel consumption or are there other benefits to the change over?

Thanks,

Mark
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Old 04-30-2012, 08:01 PM   #7
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The orifice size is the only change you need to make to the burner.

Truly, the only reason I went low pressure was so I could use the Honeywell automated valving.

As a side benefit, it is nice and quiet. My first burner was the Bayou Classic SP-10 that sounded like a jet engine.
I can't even hear the low pressure burners over the noise my pumps make.
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Old 04-30-2012, 11:50 PM   #8
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Based on bench testing:
#48 drill bit / .076"
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Old 05-01-2012, 02:07 AM   #9
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Onehoppyguy, looks like you deal alot w/ low pressure on these banjo burners which should be identical to my blichmanns. So is the size you mentioned the best for fuel, heating or combo. Just looking for a little info. Also can I pick that bit up most places or is it hard to get. Thanks again for the help
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Old 05-01-2012, 12:06 PM   #10
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I ordered the valves for the Hurricane burners from Williams brewing, they work extremely well on the burners with my standard natural gas pressure. The size on those valves was .1250


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