Boiler Types & Applications - Steam

As promised last week, this month's issue is about steam boilers. For water boiler info, please request a copy of June's newsletter.
Stay tuned at the end for "On This Day" historical events and some special history about Weil-McLain Boilers.

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Here is a short clip about combustion air supply to a boiler; complete with sound effects!

presentation by Greg Hahn.

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Steam boilers are available in low pressure (less than 15 PSI) and high pressure (greater than 15 PSI) designs. Another deciding factor in the model, is whether condensate can return to the boiler or will exit to a drain. As you can imagine, returning the condensate to the boiler is much more efficient than not returning it. But not all applications can have condensate return.

In my days working with steam turbines in the navy, we did recover the condensate in the steam cycle. Great care was taken to make very clean/dry steam to avoid damaging the turbine blades.

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Steam Boilers

Lattner WLF series from 7.6 MBH to 2,000 MBH

                                                                 Weil-McLain cast iron steam boilers
                                                                     80 series 364 to 1,674 MBH
                                                                    88 series 1,010 to 5,845 MBH
                                                                    94 series 2,540 to 8,660 MBH

Lattner Electric steam boilers from 6kw to 3,600kw

          Every Johnston 4-pass maximizes effective heat transfer using a full                                five square feet of heating surface per BHP

The decision on whether to use a steam boiler which has condensate returning to the boiler is application dependent. Closed loop heating steam will have condensate returning. A high-temperature steam washing station would not have condensate returning because the process steam would become contaminated.