shotgun condenser in LM/boka

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Franck S
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shotgun condenser in LM/boka

Post by Franck S »

Hello,

Most reflux design like boka or LM uses a coil condenser to reflux all vapors.
The top of the column is "open" (not sealed/airtight)

I was wondering: why not use a "shotgun" condenser like (see image below)?
Would it be less efficient or is there any cons (excepted the longer size)?


I only see this kind condenser in CM reflux column.

My apologies if the topic has already been covered in another topic!

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Steve Broady
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Re: shotgun condenser in LM/boka

Post by Steve Broady »

There are people here with a LOT more experience than I have. However, I can tell you that I tried something similar just out of curiosity. What I found was that the relatively small diameter tubes filled with liquid which then blew up and out, making the whole thing unstable and a pain to deal with. If you do it, you’ll want larger (1/2” minimum?) vapor tubes.
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OtisT
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Re: shotgun condenser in LM/boka

Post by OtisT »

If the shotgun condenser is sized appropriately to knock down your max power input, go for it. It will work fine as a reflux condenser. Just leave the top of the condenser open.
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Beefer
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Re: shotgun condenser in LM/boka

Post by Beefer »

From recent experience - I tried running my 2" boka with an almost identical shotgun, mainly because my coil couldn't quite knock down the element at full power and I wanted to reduce my stripping run times. Problem I found was the gap between the slant plates and the start of the shotgun was heating up the output a bit too much for my liking. No big deal though, settled now with pot still stripping runs and slow boka spirit runs for neutrals and double pot for everything else.
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bunny
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Re: shotgun condenser in LM/boka

Post by bunny »

OtisT wrote: ↑Mon Mar 06, 2023 5:11 pm If the shotgun condenser is sized appropriately to knock down your max power input, go for it. It will work fine as a reflux condenser. Just leave the top of the condenser open.
I am considering using one of these 8" units on my ss 45* LM system.
image.jpeg
I'm hoping someone can tell me from personal experience how many watts this small very inexpensive condenser can knock down. The eBay guy from Michigan says his source doesn't give him that information.
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Laredo7mm
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Re: shotgun condenser in LM/boka

Post by Laredo7mm »

I use an 2” tri-clamp shotgun condenser that is 8” long and has 8 tubes in it. Pretty much identical to the one shown in the original post except 8 inches long and not 17+. I have used it on my LM and my plated still. My LM head is also at a 45 degree angle. I put a domed cap with a barbed fitting for a vent tube on the end. I then attach a piece of tubing to the vent and put a loop in it. That way the still head is still open and if I am getting any vapor blow by through the reflux condenser, I can see it condensing inside the tubing.

In my plated still, I know it can knock down all the vapor that my 5500W heating element can put out at 75%. So at least 4125W and that is with a trickle of water. I have never tried to max it out on my LM as I assumed that a 2 inch packed column wouldn’t be able to handle all that wattage. 75% on my 3 inch plated still (reduced down to 2 inches before the dephlegmator) will start to flood depending on the alcohol content of the boiler charge, so I can’t imagine that a 2” column could handle 75%. I made my own stainless steel coils to fit into the still head and always went back to the reflux shotgun condenser.

I think I have seen that guy on eBay that is from Michigan. Lions brewing or something like that. It looks like he gets all his stuff from China. Some of his product photos have a watermark stamp from OakStills which is out of China. You can cut out the middle man by purchasing directly from AliExpress if you want to save a little money.
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