Westinghouse 5026 Instruction Pamphlet page 4

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Fig. 2. Rear View of the 8%/1 Cross Compound Air Compressor
with "F-I-A" Lubricator •
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SJ;2"
CROSS COMPOUND
AIR COMPRESSORS
The Westinghouse 8%" Cross Compound Compressor
was developed for the specific purpose of combining
maximum capacity and highest efficiency, by compouna­
ing both the steam supplied and the air compressed to
the extent that, while this compressor has a capacity
over three times greater than the well known 9%" single
stage compre3sor, the steam consumption per 100
fpet of air compressed is but one-third.
The 8%" compressor is supplied in two sizes. The
8%"-150, ordinarily used in steam road service, has a
normal displacement of 150 cubic feet when operating on
200 pounds steam pressure. The 8%"-120 was designed
to operate on a lower steam pressure, and has a normal
displacement of 120 cubic feet when operating on 160
pounds steam pressure.
While the cross compound air compressor was orig­
inally designed to operate on saturated steam at a
maximum of 200 pounds pressure, the introduction of
superheat steam and higher pressures was later respon­
sible for modifications providing operation on steam
pressures up to 275 pounds.
The present recommended standard 8%"-150-D air
compressor is suitable for use with both saturated and
superheat steam up to 300 pounds pressure.
A Special air compressor, known as the 8%"-150-S,
is available for steam pressures up to 400 pounds
pressure.
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