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10
CROSS COMPOUND AIR COMPRESSORS
•
- - - - - A
i-
PIPE FOR DRAIN PIPE
$ECTION TAKEN AT B·SB.B
FRONT OF
COMPRESSOR
Fig. 4. Views of Center Piece, Showing Drainage and Location
of Oil Hole for High Pressure Air Cylinder
""
DESCRIP'fION
11
Fig. 4 shows partial sectional views of the center
piece of the compressor, illustrating the provision made
for draining off from the center piece the water which
drips from the stuffing boxes. The water which thus
accumulates is drained through passages a' and c'
to
b'
and
them~e
through the drain pipe connection on the
lower flange to some convenient point, as between the
engine frame.
Fig. 4 also shows the present location of oil hole for
the high pressure air cylinder. Whereas the oil hole was
formerly located ncar the discharge passage from the
pressure cylinder, an oil hole is now located at a
point where the oil will feed directly into the inlet pas
sages to the high pressure air cylinder. The center
is tapped for %-inch pipe on both the front and
back of the rear wall, thus permitting of attaching the
oil pipe at either the front or the back. Our standard
practice, however, is to connect the oil pipe at the front
for the sake of accessibility, with the back opening
plugged. Interchangeability is not affected in any way
since the old connection is still
The arrangement of holes, as illustrated, enables the
oil passage in the center piece to be cleaned out merely
by removing the plug at the top of the angular hole a
and introducing into it a straight inflexible rod.
Plates 1 and 2, are diagrammatic views in which the
piston valve and reversing valve are turned 90
horizontally from their aetual position in order to make
the operation more easily understood, and all ports and
passages are connected in the simplest possible manner,
without regard to the actual construction of the com
pressor.
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