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Plastic shell & copper tubes

These are various style condensers for many different applications.

Plastic shell & copper tubes

Postby jake_leg » Tue Jan 15, 2013 2:45 pm

No fat copper pipes, no pricey fittings, no silver soldering, straightforward assembly. I know I said I would never build a shotgun condenser in this life, but that was before I read this post:

I acquired some 3/8" (7/16" OD) copper
tubing. I figured an arrangement of 7/16" holes to fit within the OD of a 2"
copper cap...it worked out to be 14, in rows of 3,4,4, and 3 respectively,
evenly spaced. I cut 14 sections of the 1/4" tubing 1 foot long, fit the ends
into the holes in the cap and soldered from the inside of the cap. Repeat for
the other side. From the side, it kinda looks like ]=====[ (but more rows
than just two). I put a short nipple of 2" pipe on one side and a 45 degree
elbow on the other side. I happened to have 4" ABS pipe on hand (though 3"
would be just as good) and here's where the fun happened. Using two rubber
reducers (4" to 2", of course) that attach with hose clamps, I attached the
plastic shell to the copper tube bundle...voila! Instant shell and tube
condenser. [Drill and tap holes] for coolant fittings. The beauty of the
rubber reducers is that they flex with the thermal expansion of the copper and
the hose clamp keeps a positive seal on both the copper *and* it allows for
disassembly for whatever reason. Almost one year of service and it's not leaked
a drop. Also, the tubes make for a huge improvement in surface area for
condensation so the length can be much shorter than a single tube Liebig style
condenser.
I remember Aaron Schnell
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Re: Plastic shell & copper tubes

Postby Bushman » Tue Jan 15, 2013 8:55 pm

That is very similar to the way my shotgun is put together and she has worked great.

Image
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Re: Plastic shell & copper tubes

Postby jake_leg » Tue Jan 15, 2013 11:09 pm

That's pretty!
I remember Aaron Schnell
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Re: Plastic shell & copper tubes

Postby Bushman » Tue Jan 15, 2013 11:21 pm

We first tried to seal with calk but with the expansion and pressure she just leaked. The rubber and clamps have survived the test of time!
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Re: Plastic shell & copper tubes

Postby jake_leg » Wed Jan 16, 2013 12:31 am

I must have missed out on this first time around. I've been casting about for your build thread. Can you find it for me please?!
I remember Aaron Schnell
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Re: Plastic shell & copper tubes

Postby Bushman » Wed Jan 16, 2013 12:05 pm

jake_leg wrote:I must have missed out on this first time around. I've been casting about for your build thread. Can you find it for me please?!



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