Spiral water tube boiler designs include Climax Boilers, Lune Valley Boilers, Monotube Boilers, The Baker Boiler, Ofeldt Boilers, and many others. Lune Valley Boiler. Ofeltd Boiler. Climax Boiler; D-Type Boiler The first water-tube boiler type that we will discuss is called the D-type because the shape of the boiler is similar to the letter D.
Building a Super Simple Vertical Steam Boiler You want to build a simple steam boiler to drive your steam models? And does "simple" to you mean no silver soldering or anything complicated in the construction? Then maybe you can pick up some tips here with my first attempts at building a first live steam boiler.
The Lune Valley boiler was a small oil-fired boiler, used by the Lune Valley Engineering Co. of Lancaster, England for steam launches and small steamboats.   Each steam generator tube consisted of three turns, giving a greater heating surface for the number of pipe joints to be made.
Link: http://www.boilercatalogue.top/lune-valley-steam-boiler.html List of boiler types, by manufacturer - Wikipedia, the … There have been a vast number of ...
Watertube boilers: Wikipedia's general info on water tube boilers. A Yarrow-type watertube boiler from Ed Haas' Pegasus pages. Bart Smaalder's Lune Valley design watertube boiler for his SL Otter. Excellent photos Check out Rainer Radow's own take on a Roberts-type watertube boiler. Really interesting. Vielen Dank, Rainer!
The main advantage of water tube boilers (over fire tube or shell boilers) is that much higher pressures can be sustained, and therefore water-tube boilers are used in power station applications that require high steam output (up to 500 kg/s), high steam pressure (up to 160 bar), and/or Superheated steam (up to 550°C).