"The Other Mike" wrote in message
...
On Fri, 16 Aug 2013 07:47:15 +0100, "harryagain"

wrote:

There are almost unsurmountable problems associated with pumpimg very hot
water into steam boilers.

Depends what you mean by very hot. UK coal and nuclear stations have no
problems pumping water at 160 deg C. I'd call that more than a bit hot.
Not
steam temperature at the boiler outlet temperatures but still 'very hot'

You can pump it at whatever temperature as long as the pressure is
sufficient to prevent cavitation in the pump(s).
And feedwater heaters are downstream of the pump for that very reason.