[Steam-engine] feedwater methods

[Joe s Rogers]

        I use city water as a back up to my injector; I have about 120
psi coming from the city water source.
The problem with this is, I was injecting water that was too cold. Not
good for a boiler.  How I overcame this problem is I took a 10 gal water
tub and sat it underneath my injector overflow so that I could fill it
with hot water.  Then I bought 100 foot of 5/8 copper tubing and
connected one end to the city water and one end to the boiler and laid
the rest of the coil in the hot water. This made the inspector happy
having 2 sources of heated water.  
 
There is something I need to add and I should hope it should be a given,
but for the sake of safety I think I should say it.   When hooking a
boiler to city water be sure you have a check valve in line incase your
city water pressure should drop.  A check valve will prevent water from
your boiler form back flowing into the city water system. (I heard a
story of this happening in a Balt. city school around 10 years ago) A
child got burned.
 
Please pardon my spelling; it is because of this I do not contribute
often 
 
Joe Rogers
       

On Tue, 8 Nov 2005 13:24:47 -0800 (PST) travis brown <tbkeck at yahoo.com>
writes:
> I have been following in on the discussion on the proper method of 
> introducing water into the boiler and thought I would add this to 
> the discussion.  Now I am NOT advocating this method, just 
> mentioning that it has been done.  The inspector in my state has 
> lowered the working pressure on a boiler down to where the injector 
> does not work on a particular boiler.  The owner did not apparently 
> have a pump or at least one that worked, but instead had found that 
> the water pressure at the location is over his MAWP and uses that to 
> force water into the boiler.  First of all that violates the common 
> sense rule that there should be at least two methods of introducing 
> water into the boiler and second what is going to happen when there 
> is a fire or every takes a shower, lowering the pressure?  But if 
> one has the access to a tap with this kind of water pressure, I 
> think that having this method as a third or forth backup for those 
> situations where the injector needs more pressure and the p
>  ump is
>  balky would be something to keep in the back on ones mind, just in 
> case of emergency.
>  
> tb
> 
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