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Posted by HeatPro on May 20, 2007 at 16:35:47:
In Reply to: Re: right boiler for steam appliances? posted by karl Ohly on May 20, 2007 at 12:42:39:
The appliance calls for steam source 40psi at 276 degrees farenheit.
Pressure vessels usually give specifications for the maximum safe working pressure. This doesn't mean that they MUST work at that pressure all the time. I doubt soup would remain soup in an open vessel after being subjected to heat 64F degrees hotter than boiling unless the soup was kept at 40 psig also, which makes the whole process too dangerous for a home.
You can feed an exchange-jacketed vessel 250F water with pressure lower than 15 psig and not be concerned at all.