Shay Fire - Oil Burner
Nelson Riedel Nelson@NelsonsLocomotive.com
Initial: 12/03/03 Last
The basis for burner
described here is Bob Reedy's burner for his Three-Truck Climax described in the
May/June 2003 issue of Live Steam .
Update 4/28/04: After a number of tests the burner described here
was modified, see Shay
Fire - Burner Tests & Modifications
Update 9/23/05: The fire pan was
redesigned with much improved results. See
More Improvements . End Updates.
|Atomizer: The atomizer regulator is located under the
platform covering the the reversing linkage as shown on the
right. This view is from the right side (cab removed).
The regulator is a Clippard model MAR-1-2 with a regulation range of
0- 20 psi. The input from the lower valve on the
manifold goes to the center rear of the regulator via the 1/4"
tube. The regulator bottom port is the output that goes
to the left leg of the 3/16" tee. The right leg of the
tee goes down to a union that connects to the atomizer pipe at the rear
of the fire pan. The upper port of the tee goes to the
elbow-union-elbow fittings and then via the bent pipe to a
compressing fitting and then into 1/8" pipe fittings to a
|The regulator ports are threaded 10-32. Adaptor nipples
threaded 10-32 on one end and MTP on the other were
fabricated. The regulator end of the nipples were initially sealed with Teflon
washers and nuts. The Teflon leaked at higher temperatures
and when the nuts were tightened to add pressure on the Teflon, it
mere squeezed out the sides. The Teflon washers were replaced
with aluminum washers which sealed properly.
This is the view looking down on regulator. (The platform
cover is removed.) The two brass 1/8" pipe street
elbows rest on the platform top and provide support for the
The regulator is rated at 230 degrees F so this application will
stretch it a bit. Unions are used on the connections so that
regulator can be replaced without disassembling the
|This is the inside of the cab. The input pipe to the
regulator is visible under the lower valve on the blower/atomizer
manifold. The regulator control knob is at the rear side
of the platform. The gauge is 0-30 psi. The system
was pressurized with compressed air and the regulator was set to 12
psi when the photo was taken.
The burner is ready to go. However, the blower must be hooked up
before the fire can be started.