Water Tube Boiler

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For the past couple of months, I've been working on a water tube boiler. I wanted something safer and more efficient than my pot boiler. I also wanted it big enough to run my 1/4hp PM Research 6CI.

Today was the first successful steaming and though not done, I thought I'd post my progress so far.

Please note that this isn't a "model" of any type. The goal was not to duplicate any legacy design. It is for functionality.

I'm sure some of you have seen the Youtube videos of a monotube boiler from Lynxsteam (https://youtu.be/bY8BortErf8). I used his design as a starting point and have shamefully used some of his ideas.

My boiler is smaller though:

Tubing:

Type: Copper M-type, 3/8" OD
Length: Waterwall: 25 ft
Length: Coil: 50 ft
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Case:

Material: 11" OD x .120 wall ERW tubing
Height: 24"
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I don't have any automatic controls set up yet, but when done, it'll all run on 12vdc power. For now I hooked up a solenoid valve to inject water from my house plumbing. (I was surprised when I found out my house water is at 70 psi!)

Ok now for some pictures. I hope what I've done is self explanatory:

 

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Continuing on with the pictures:

 

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Now for the video of the boiler test:

[ame]http://www.youtube.com/watch?v=QrKAll4ux7o[/ame]