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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.


 

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

presentation by Greg Hahn.


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.


Steam Boilers

 Lattner WLF series from 7.6 MBH to 2,000 MBH

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

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

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

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.