Operation Manual

Diesel fuel flow sensor kit Installation and Operation Manual
29
NAVMAN
Panel
Remove clamps to release pipe
Hold pipe away from panel
1
2
Cut pipe with pipe cutter
Fit barrel unions to a sensor temporarily. Do not
apply threadseal. Do up the unions loosely.
7-4-1 Installing a through pipe with flare joints into a copper pipe run
This describes how to install a through pipe
with a flare joint. For the full procedure, follow
the steps of section 7-4.
Fitting a flare joint requires the use of a pipe
cutting tool, a flaring tool, possibly pipe bending
tools and flare nuts. To take the example of a
3/8 OD inch pipe, you will need to find from a
fitting supplier, for each flare joint:
a 3/8 inch flare nut
a 3/8 inch flare to ¼ NPT taper thread
barrel union
some Teflon® tape or Teflon® threadseal
paste.
If the pipe is fixed to a panel, such as a beam or
bulkhead, you will have to release it and bend
the pipe out to be able to cut it. Mark the pipe
where you wish to put the sensor and cut it
using a pipe cutter. Do not use a hack saw.
65 mm
(2.5 in)
At least
50 mm
(2 in)
straight
Cut pipe to exact length
with pipe cutter
3
Hold sensor in place
If necessary, bend the pipe in an ‘S’ curve to
align it with the sensor port, 65mm (2.5”) out from
the surface where the sensor will be mounted.
Hold the sensor in place by hand to check that
the pipe lines up with the sensor port.
Gentle, large radius bends can be made by
bending the pipe around a curved former by
hand, but take care not to kink or crush the
tube. If room is restricted and you must form
tight radius bends then you will have to use a
pipe bending tool.
Do not bend the pipe too close to the end - you
must have at least 50mm (2”) or more of straight
pipe to allow the flare nut on and still have room
for the flaring tool to work.
If necessary, use the pipe cutter to cut the pipe
to the exact length to match the sensor port.
Do not make the curves too tight and do not
cut the pipe short. It is also wise to allow for
the possibility that you might make a mistake
on the flaring process, and have to cut your
first attempt off and start again. It is better to
allow for the possibility, than to cut the pipe to
absolutely the shortest possible.
Top view
Top view