j.
Compressed air temperature downstream of aftercooler temperature
gage.
k.
Interstage air temperature after intercooler of each stage
temperature gages.
l.
Compressor inlet air temperature gage.
m.
Cooling water to compressor temperature gage.
n.
Cooling water outlet temperature at outlet of each intercooler and
aftercooler temperature gages.
2.3.6
Compressor Design Features
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NOTE: Provide sound attenuating enclosure or make
other provisions to comply with OPNAV 5100.23,
Chapter 18, paragraph 18202, "Preventive Measures,"
which contains noise abatement requirements for new
machinery and equipment. If manufacturers do not
furnish sound attenuating enclosure as a
factory-built option, delete the sound enclosure
from this section and consider other means for
meeting noise abatement requirements, such as: (1)
other types of compressors which are furnished with
sound attenuating enclosures, (2) field erected
equipment enclosures from sources other than the
compressor manufacturer, and (3) soundproofed office
or personnel enclosure.
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The compressor shall be a multistage, nonlubricated, oil-free
reciprocating, double-acting compressor, with a minimum of two compressor
stages and water-cooled cylinders and heads. The cylinder arrangement may
be horizontal, vertical, V-type, radial, or semi-radial, which will fit in
space indicated. An intercooler shall be provided between stages, and
aftercooler shall be provided after the final stage of compression.
Silencers, lubricating system, cooling system, control system, and driver
shall be mounted as part of the package. Provide a common base frame for
the compressor system and driver. [Provide a sound enclosure over the
compressor and driver.] Equipment shall be designed for economical and
rapid maintenance. Frame, cylinders, cylinder heads, bearing housings, and
other major parts shall be shouldered, dowelled, or designed with other
provisions, to facilitate accurate alignment or reassembly. Packing,
seals, and bearings shall be accessible for inspection or replacement with
a minimum of disassembly.
2.3.6.1
Frame
Frame shall be one-piece cast iron, ribbed for strength, and shall provide
support for crankshaft main bearings and crossheads, and a sump or
reservoir for lubricating oil. The frame shall be completely enclosed and
provided with gasketed access covers for inspection and maintenance.
2.3.6.2
Crankshaft and Main Bearings
Crankshaft shall be one-piece solid forged steel, heat treated, machined,
SECTION 15214N
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