(erielack) Feedwater heaters

[Rich Young <ryoungceo_@_yahoo.com>]

  Feedwater Heaters

The previous answers to the questions were pretty much
correct. As Irony would have it I was up to my
.....well armpits, in a Worthington SA 4 1/2 hot water
pump when this discussion was started.

Worthington ( which was a division of Worthington Pump
and machine) produced the 

B, BL , BL1 to BL-4, which were all about the same in
design just increasing in capacity of water feed to
keep up with bigger Locomotives. These were an open
pump style feed that had the exchanger and pump all as
one unit. they eventualy switched to the

S, S-1, S-2, SX,SA and SA-2 which devided the cold
water feed to it's own pump a seperate exchanger and
then a hot water pump to push into the boiler. all
these units were almost exactly the same. Only a
trained eye can tell them apart. If you want a
difference between them I can tell you but most were
not visable differances.

these were all open type systems where in the exhaust
steam came into direct contact with the feedwater. the
downside to this was the valve oil used for
lubrication had a tendency to build up in the boiler
and cause foaming as valve oil contained high
quantities of animal fat. (tallow) which is also used
for making soap. the upside was you had a thermal
conversion rate at just under the flash point to
steam.


Now the Elesco K Bundle was also an excellent system
it being closed with good thermal conversion the
downside was that the bundle used copper tubes between
the ends and the had a tendency to pull apart and
leak. but over all a very simple and easy to run
system. The exchanger was filled with exhaust steam
and water was fed through inside tubes to get
preheated and pushed into the boiler.


Now a Coffin was almost exactly like an Elesco in it's
base operation except the size and style of the
exchanger. being in the smokbox or mounted out front.


I have sent some scans of the different systems for
you to look at.


Any other in depth tech questions fell free to send
in.

As far as the Erie Railroad, almost everything with a
trailing truck had a feedwater system on it,  as the
AMC was a big on the savings the they generated. A
feedwater system was the second most usefull, cost
saving, and labor saving appliance on a locomotive
behind the superheater.

Rich Young
Worthington Feedwater Heater  Midwest Tech Rep.
Contact through www.765.org

or John Rassmusen
Worthington Feedwater Heater West coast Tech Rep.
Portland Roundhouse or
www.sp4449.com

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