Technical Information
Garratt Steam Coupling

When I built my free lance Garratt I faced the problem of lack of space
for steam hoses and I also prefered to have copper rigid pipes for high
pressure steam.I sat for a while looking at it thinking how can I do it
.The idea of passing the steam through the centre of the couplings
came to my mind, hence the design below which I gave to John
Comming who publlished it in the AME a few years ago .
REGULATOR FOR FIVE INCH GAUGE

I designed this regulator for medium size 5" G engines and used
it on few locomotivess successfully .It is suitable for dome
installation only in as is drawn.
I have used this regulator on C36 in the smoke box by installing
it horizontally and repositioning steam inlet and outlet for
external control rod .
I have also used it on Z13 7.25" G by multipling all sizes by 1.4 .
As long as proportions are kept witin reason this unit can be
made in any size .